#587BA3
Closest named color: Stormy Blue (#507B9C). oklch(57.3% 0.074 252.4), rgb(88, 123, 163).
Aa
Black text reads best on this color (4.77:1).
About this color
#587BA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.074 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.015 away. Black text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.77:1 |
| White text | 4.39:1 |
Values
| HEX | #587BA3 |
| RGB | rgb(88, 123, 163) |
| HSL | hsl(212, 30%, 49%) |
| OKLCH | oklch(57.3% 0.074 252.4) |
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 #587BA3 | 4.39:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #587BA3 | 4.77:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #587BA3 text on white | 4.39:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #587BA3 text on black | 4.77:1 | AA | Lc -31.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B2C2D6
oklch(80.8% 0.033 254)
-
Step 400
400
#89A3C1
oklch(70.6% 0.053 252.2)
-
Step 500
500
#6C8CB2
oklch(63% 0.068 253.1)
-
Step 600
600 (this color)
#587BA3
oklch(57.3% 0.074 252.4)
-
Step 700
700
#446387
oklch(49.1% 0.069 252.8)
-
Step 800
800
#38516E
oklch(42.8% 0.057 252.8)
-
Step 900
900
#304359
oklch(37.7% 0.045 252.6)
-
Step 950
950
#1C2734
oklch(26.9% 0.029 253)
#587BA3 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) | #6B7CA5 | 0.025 |
| Deuteranopia (no green cones) | #6275A2 | 0.020 |
| Tritanopia (no blue cones) | #3A8489 | 0.064 |
| Achromatopsia (no color) | #787878 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #587BA3
#587BA3
oklch(57.3% 0.074 252.4)
- #937145
#937145
oklch(57.2% 0.074 72.6)
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 #587BA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.015
- Cerulean #457B9D ΔE 0.023
- Off Blue #5684AE ΔE 0.027
- Dull Blue #49759C ΔE 0.027
- Steel Blue #4682B4 ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.032
- Cool Blue #4984B8 ΔE 0.037
- Grey Blue #647D8E ΔE 0.037
Use #587BA3 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.