#37596B
Closest named color: YInMn Blue (#415A77). oklch(44.6% 0.049 232.5), rgb(55, 89, 107).
Aa
White text reads best on this color (7.49:1).
About this color
#37596B is a dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.049 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.024 away. White text reads best on it, at 7.49:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #37596B |
| RGB | rgb(55, 89, 107) |
| HSL | hsl(201, 32%, 32%) |
| OKLCH | oklch(44.6% 0.049 232.5) |
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 #37596B | 7.49:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #37596B | 2.80:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #37596B text on white | 7.49:1 | AAA | Lc 86.0 | Fine for body text |
| #37596B text on black | 2.80:1 | Fails | Lc -16.1 | 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
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AFC4D0
oklch(80.8% 0.029 232.8)
-
Step 400
400
#84A6B9
oklch(70.6% 0.047 232.8)
-
Step 500
500
#6590A7
oklch(63.1% 0.058 232.3)
-
Step 600
600
#4B7A93
oklch(55.6% 0.064 232.8)
-
Step 700
700
#3C677D
oklch(49.2% 0.059 232)
-
Step 800
800 (this color)
#37596B
oklch(44.6% 0.049 232.5)
-
Step 900
900
#2C4553
oklch(37.6% 0.039 233.8)
-
Step 950
950
#1A2930
oklch(27.1% 0.024 228.7)
#37596B 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) | #50586C | 0.033 |
| Deuteranopia (no green cones) | #49526B | 0.030 |
| Tritanopia (no blue cones) | #1F5E5F | 0.037 |
| Achromatopsia (no color) | #555555 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37596B
#37596B
oklch(44.6% 0.049 232.5)
- #6A4D3A
#6A4D3A
oklch(44.6% 0.049 54.3)
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 #37596B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.024
- Petrol #005F6A ΔE 0.037
- Dusty Grape #545775 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.052
- Deep Teal #00555A ΔE 0.052
- Slate #516572 ΔE 0.053
- Dusk #4E5481 ΔE 0.054
Use #37596B 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.