#37546D
Closest named color: YInMn Blue (#415A77). oklch(43.4% 0.054 245.5), rgb(55, 84, 109).
Aa
White text reads best on this color (7.92:1).
About this color
#37546D is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.054 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.027 away. White text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.65:1 |
| White text | 7.92:1 |
Values
| HEX | #37546D |
| RGB | rgb(55, 84, 109) |
| HSL | hsl(208, 33%, 32%) |
| OKLCH | oklch(43.4% 0.054 245.5) |
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 #37546D | 7.92:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #37546D | 2.65:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #37546D text on white | 7.92:1 | AAA | Lc 87.4 | Fine for body text |
| #37546D text on black | 2.65:1 | Fails | Lc -14.7 | 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
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D4
oklch(80.8% 0.032 245.2)
-
Step 400
400
#87A4BF
oklch(70.6% 0.051 246.7)
-
Step 500
500
#698EAF
oklch(63.2% 0.065 246)
-
Step 600
600
#50789A
oklch(55.7% 0.07 245.1)
-
Step 700
700
#406584
oklch(49.2% 0.066 245)
-
Step 800
800 (this color)
#37546D
oklch(43.4% 0.054 245.5)
-
Step 900
900
#2E4457
oklch(37.7% 0.043 245.3)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#37546D 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) | #4A546E | 0.026 |
| Deuteranopia (no green cones) | #434F6D | 0.021 |
| Tritanopia (no blue cones) | #1F5A5C | 0.046 |
| Achromatopsia (no color) | #515151 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37546D
#37546D
oklch(43.4% 0.054 245.5)
- #664B30
#664B30
oklch(43.5% 0.055 65.6)
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 #37546D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.044
- Dusty Grape #545775 ΔE 0.045
- Petrol #005F6A ΔE 0.048
- Dusk #4E5481 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.052
- Light Navy #155084 ΔE 0.052
Use #37546D 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.