#37516D
Closest named color: YInMn Blue (#415A77). oklch(42.6% 0.057 251), rgb(55, 81, 109).
Aa
White text reads best on this color (8.20:1).
About this color
#37516D is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.057 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.033 away. White text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.56:1 |
| White text | 8.20:1 |
Values
| HEX | #37516D |
| RGB | rgb(55, 81, 109) |
| HSL | hsl(211, 33%, 32%) |
| OKLCH | oklch(42.6% 0.057 251) |
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 #37516D | 8.20:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #37516D | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #37516D text on white | 8.20:1 | AAA | Lc 88.3 | Fine for body text |
| #37516D text on black | 2.56:1 | Fails | Lc -13.9 | Not readable |
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
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B1C3D6
oklch(81% 0.033 249.7)
-
Step 400
400
#89A3C1
oklch(70.6% 0.053 252.2)
-
Step 500
500
#6B8DB1
oklch(63.2% 0.067 250.3)
-
Step 600
600
#52769D
oklch(55.5% 0.074 251.2)
-
Step 700
700
#436386
oklch(49% 0.068 251.5)
-
Step 800
800 (this color)
#37516D
oklch(42.6% 0.057 251)
-
Step 900
900
#304358
oklch(37.6% 0.044 251.5)
-
Step 950
950
#1C2734
oklch(26.9% 0.029 253)
#37516D 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) | #46526E | 0.021 |
| Deuteranopia (no green cones) | #3F4D6C | 0.015 |
| Tritanopia (no blue cones) | #20575B | 0.048 |
| Achromatopsia (no color) | #4F4F4F | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37516D
#37516D
oklch(42.6% 0.057 251)
- #62492B
#62492B
oklch(42.5% 0.056 70.4)
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 #37516D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.047
- Dusk #4E5481 ΔE 0.048
- Light Navy #155084 ΔE 0.048
- Dusty Grape #545775 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.052
Use #37516D 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.