#37586C
Closest named color: YInMn Blue (#415A77). oklch(44.4% 0.051 236.1), rgb(55, 88, 108).
Aa
White text reads best on this color (7.56:1).
About this color
#37586C is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.051 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.023 away. White text reads best on it, at 7.56:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.77:1 |
| White text | 7.56:1 |
Values
| HEX | #37586C |
| RGB | rgb(55, 88, 108) |
| HSL | hsl(203, 33%, 32%) |
| OKLCH | oklch(44.4% 0.051 236.1) |
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 #37586C | 7.56:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #37586C | 2.77:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #37586C text on white | 7.56:1 | AAA | Lc 86.2 | Fine for body text |
| #37586C text on black | 2.77:1 | Fails | Lc -15.8 | Dividers and decoration only |
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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AFC4D2
oklch(80.9% 0.03 237)
-
Step 400
400
#85A6BB
oklch(70.8% 0.048 236.3)
-
Step 500
500
#6590AA
oklch(63.2% 0.061 235.6)
-
Step 600
600
#4C7995
oklch(55.5% 0.066 237)
-
Step 700
700
#3D667F
oklch(49.1% 0.061 236.6)
-
Step 800
800 (this color)
#37586C
oklch(44.4% 0.051 236.1)
-
Step 900
900
#2D4554
oklch(37.7% 0.039 236.7)
-
Step 950
950
#1A2831
oklch(26.8% 0.025 237.2)
#37586C 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) | #4F576D | 0.032 |
| Deuteranopia (no green cones) | #47526C | 0.026 |
| Tritanopia (no blue cones) | #1F5D5F | 0.038 |
| Achromatopsia (no color) | #545454 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37586C
#37586C
oklch(44.4% 0.051 236.1)
- #694C38
#694C38
oklch(44.2% 0.05 55.6)
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 #37586C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.023
- Petrol #005F6A ΔE 0.039
- Dusty Grape #545775 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusk #4E5481 ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.052
- Deep Teal #00555A ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.054
Use #37586C 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.