#587CC0
Closest named color: Cool Blue (#4984B8). oklch(59% 0.113 262.3), rgb(88, 124, 192).
Aa
Black text reads best on this color (5.05:1).
About this color
#587CC0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.113 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.031 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #587CC0 |
| RGB | rgb(88, 124, 192) |
| HSL | hsl(219, 45%, 55%) |
| OKLCH | oklch(59% 0.113 262.3) |
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 #587CC0 | 4.15:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #587CC0 | 5.05:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #587CC0 text on white | 4.15:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #587CC0 text on black | 5.05:1 | AA | Lc -33.2 | 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
#AFC1E2
oklch(80.8% 0.051 262.6)
-
Step 400
400
#85A1D4
oklch(70.7% 0.081 262.2)
-
Step 500
500
#6789C8
oklch(63.1% 0.103 262.1)
-
Step 600
600 (this color)
#587CC0
oklch(59% 0.113 262.3)
-
Step 700
700
#3F5F9C
oklch(49.1% 0.105 262.3)
-
Step 800
800
#344E7E
oklch(42.7% 0.086 261.8)
-
Step 900
900
#2E4165
oklch(37.7% 0.067 262.4)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#587CC0 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) | #6182C3 | 0.021 |
| Deuteranopia (no green cones) | #5478BF | 0.013 |
| Tritanopia (no blue cones) | #1E8B95 | 0.101 |
| Achromatopsia (no color) | #7C7C7C | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #587CC0
#587CC0
oklch(59% 0.113 262.3)
- #9E761B
#9E761B
oklch(59% 0.113 82.6)
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 #587CC0, closest first.
No curated palette has a color within ΔE 0.04 of #587CC0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.033
- Windows Blue #3778BF ΔE 0.036
- Off Blue #5684AE ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.046
- Faded Blue #658CBB ΔE 0.052
- Water Blue #0E87CC ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.054
Use #587CC0 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.