#37595C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.9% 0.04 202.9), rgb(55, 89, 92).
Aa
White text reads best on this color (7.64:1).
About this color
#37595C is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.040 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.037 away. White text reads best on it, at 7.64:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #37595C |
| RGB | rgb(55, 89, 92) |
| HSL | hsl(185, 25%, 29%) |
| OKLCH | oklch(43.9% 0.04 202.9) |
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 #37595C | 7.64:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #37595C | 2.74:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #37595C text on white | 7.64:1 | AAA | Lc 86.5 | Fine for body text |
| #37595C text on black | 2.74:1 | Fails | Lc -15.6 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B0C5C7
oklch(80.8% 0.023 203.7)
-
Step 400
400
#86A8AB
oklch(70.7% 0.037 203)
-
Step 500
500
#679296
oklch(63% 0.047 203.3)
-
Step 600
600
#4D7D81
oklch(55.7% 0.052 202.5)
-
Step 700
700
#3E696D
oklch(49.1% 0.048 203.3)
-
Step 800
800 (this color)
#37595C
oklch(43.9% 0.04 202.9)
-
Step 900
900
#2D4749
oklch(37.8% 0.032 202)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#37595C 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) | #54565C | 0.040 |
| Deuteranopia (no green cones) | #4E515C | 0.038 |
| Tritanopia (no blue cones) | #285B5A | 0.017 |
| Achromatopsia (no color) | #535353 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37595C
#37595C
oklch(43.9% 0.04 202.9)
- #674A48
#674A48
oklch(44% 0.04 23.3)
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 #37595C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.037
- Petrol #005F6A ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.040
- Deep Teal #00555A ΔE 0.042
- YInMn Blue #415A77 ΔE 0.048
- Dark Aqua #05696B ΔE 0.052
- Dark Blue Green #005249 ΔE 0.058
- Slate #516572 ΔE 0.060
Use #37595C 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.