#37596F
Closest named color: YInMn Blue (#415A77). oklch(44.7% 0.054 238), rgb(55, 89, 111).
Aa
White text reads best on this color (7.44:1).
About this color
#37596F is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.054 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.019 away. White text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.82:1 |
| White text | 7.44:1 |
Values
| HEX | #37596F |
| RGB | rgb(55, 89, 111) |
| HSL | hsl(204, 34%, 33%) |
| OKLCH | oklch(44.7% 0.054 238) |
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 #37596F | 7.44:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #37596F | 2.82:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #37596F text on white | 7.44:1 | AAA | Lc 85.8 | Fine for body text |
| #37596F text on black | 2.82:1 | Fails | Lc -16.3 | 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
#AFC4D3
oklch(80.9% 0.031 238.9)
-
Step 400
400
#84A6BD
oklch(70.8% 0.05 238)
-
Step 500
500
#648FAC
oklch(63% 0.064 238.6)
-
Step 600
600
#4A7998
oklch(55.5% 0.071 238.7)
-
Step 700
700
#3B6681
oklch(49.1% 0.065 237.6)
-
Step 800
800 (this color)
#37596F
oklch(44.7% 0.054 238)
-
Step 900
900
#2C4555
oklch(37.7% 0.041 237.4)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#37596F 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) | #4F5870 | 0.032 |
| Deuteranopia (no green cones) | #47526F | 0.028 |
| Tritanopia (no blue cones) | #1C5F60 | 0.044 |
| Achromatopsia (no color) | #555555 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37596F
#37596F
oklch(44.7% 0.054 238)
- #6B4D36
#6B4D36
oklch(44.7% 0.054 58.3)
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 #37596F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.019
- Petrol #005F6A ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.041
- Dusty Grape #545775 ΔE 0.041
- Dusk #4E5481 ΔE 0.048
- Denim #3B638C ΔE 0.051
- Slate #516572 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.053
Use #37596F 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.