#37534B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.7% 0.036 174.7), rgb(55, 83, 75).
Aa
White text reads best on this color (8.39:1).
About this color
#37534B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.036 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 8.39:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #37534B |
| RGB | rgb(55, 83, 75) |
| HSL | hsl(163, 20%, 27%) |
| OKLCH | oklch(41.7% 0.036 174.7) |
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 #37534B | 8.39:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #37534B | 2.50:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #37534B text on white | 8.39:1 | AAA | Lc 88.9 | Fine for body text |
| #37534B text on black | 2.50:1 | Fails | Lc -13.3 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D2DCD8
oklch(88.6% 0.012 170.2)
-
Step 300
300
#B3C5C0
oklch(80.8% 0.021 177.3)
-
Step 400
400
#8BA89F
oklch(70.7% 0.035 174.5)
-
Step 500
500
#6E9288
oklch(63% 0.043 175.9)
-
Step 600
600
#567D71
oklch(55.7% 0.048 173.4)
-
Step 700
700
#46695F
oklch(49.1% 0.043 174.6)
-
Step 800
800 (this color)
#37534B
oklch(41.7% 0.036 174.7)
-
Step 900
900
#324741
oklch(37.8% 0.028 175.2)
-
Step 950
950
#1D2926
oklch(26.9% 0.017 177.9)
#37534B 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) | #51504B | 0.038 |
| Deuteranopia (no green cones) | #4C4C4C | 0.036 |
| Tritanopia (no blue cones) | #2F5451 | 0.012 |
| Achromatopsia (no color) | #4D4D4D | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37534B
#37534B
oklch(41.7% 0.036 174.7)
- #5D444D
#5D444D
oklch(41.7% 0.037 355.4)
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 #37534B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Deep Teal #00555A ΔE 0.042
- Dark Blue Green #005249 ΔE 0.042
- Dark Teal #014D4E ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.050
- Charcoal #264653 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.056
- Petrol #005F6A ΔE 0.057
Use #37534B 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.