#587BBE
Closest named color: Cool Blue (#4984B8). oklch(58.7% 0.111 262.5), rgb(88, 123, 190).
Aa
Black text reads best on this color (4.99:1).
About this color
#587BBE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.111 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.032 away. Black text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #587BBE |
| RGB | rgb(88, 123, 190) |
| HSL | hsl(219, 44%, 55%) |
| OKLCH | oklch(58.7% 0.111 262.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #587BBE | 4.20:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #587BBE | 4.99:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #587BBE text on white | 4.20:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #587BBE text on black | 4.99:1 | AA | Lc -32.8 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#B0C1E2
oklch(80.9% 0.05 263.7)
-
Step 400
400
#86A1D3
oklch(70.7% 0.08 262.5)
-
Step 500
500
#6889C7
oklch(63.1% 0.101 262.4)
-
Step 600
600 (this color)
#587BBE
oklch(58.7% 0.111 262.5)
-
Step 700
700
#405F9B
oklch(49.1% 0.103 262.5)
-
Step 800
800
#354E7E
oklch(42.7% 0.086 262.5)
-
Step 900
900
#2E4165
oklch(37.7% 0.067 262.4)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#587BBE with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6081C1 | 0.020 |
| Deuteranopia (no green cones) | #5477BD | 0.013 |
| Tritanopia (no blue cones) | #218A93 | 0.101 |
| Achromatopsia (no color) | #7B7B7B | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #587BBE
#587BBE
oklch(58.7% 0.111 262.5)
- #9C751D
#9C751D
oklch(58.6% 0.11 82.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #587BBE, closest first.
No curated palette has a color within ΔE 0.04 of #587BBE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.032
- Steel Blue #4682B4 ΔE 0.033
- Windows Blue #3778BF ΔE 0.035
- Off Blue #5684AE ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.051
- Water Blue #0E87CC ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
Use #587BBE in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.