#37586D
Closest named color: YInMn Blue (#415A77). oklch(44.4% 0.052 237.5), rgb(55, 88, 109).
Aa
White text reads best on this color (7.55:1).
About this color
#37586D is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.052 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.022 away. White text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.77:1 |
| White text | 7.55:1 |
Values
| HEX | #37586D |
| RGB | rgb(55, 88, 109) |
| HSL | hsl(203, 33%, 32%) |
| OKLCH | oklch(44.4% 0.052 237.5) |
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 #37586D | 7.55:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #37586D | 2.77:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #37586D text on white | 7.55:1 | AAA | Lc 86.2 | Fine for body text |
| #37586D text on black | 2.77:1 | Fails | Lc -15.9 | 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
#85A6BC
oklch(70.8% 0.049 237.6)
-
Step 500
500
#658FAB
oklch(63% 0.063 238.2)
-
Step 600
600
#4C7996
oklch(55.5% 0.067 237.9)
-
Step 700
700
#3D6680
oklch(49.1% 0.062 237.7)
-
Step 800
800 (this color)
#37586D
oklch(44.4% 0.052 237.5)
-
Step 900
900
#2D4555
oklch(37.8% 0.04 238.4)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#37586D 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) | #4F576E | 0.032 |
| Deuteranopia (no green cones) | #47526D | 0.026 |
| Tritanopia (no blue cones) | #1E5D5F | 0.040 |
| Achromatopsia (no color) | #545454 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37586D
#37586D
oklch(44.4% 0.052 237.5)
- #6A4C37
#6A4C37
oklch(44.4% 0.052 55.9)
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 #37586D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.022
- Petrol #005F6A ΔE 0.040
- Dusty Grape #545775 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.044
- Dusk #4E5481 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.054
- Deep Teal #00555A ΔE 0.054
Use #37586D 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.