#37534F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.9% 0.034 184.9), rgb(55, 83, 79).
Aa
White text reads best on this color (8.35:1).
About this color
#37534F is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.034 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.017 away. White text reads best on it, at 8.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #37534F |
| RGB | rgb(55, 83, 79) |
| HSL | hsl(171, 20%, 27%) |
| OKLCH | oklch(41.9% 0.034 184.9) |
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 #37534F | 8.35:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #37534F | 2.51:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #37534F text on white | 8.35:1 | AAA | Lc 88.8 | Fine for body text |
| #37534F text on black | 2.51:1 | Fails | Lc -13.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D1DCDA
oklch(88.6% 0.012 184)
-
Step 300
300
#B3C5C2
oklch(80.9% 0.02 184.8)
-
Step 400
400
#8BA7A3
oklch(70.6% 0.032 185.9)
-
Step 500
500
#6E928C
oklch(63.1% 0.041 183.6)
-
Step 600
600
#557C77
oklch(55.6% 0.044 186)
-
Step 700
700
#456964
oklch(49.2% 0.042 185)
-
Step 800
800 (this color)
#37534F
oklch(41.9% 0.034 184.9)
-
Step 900
900
#314643
oklch(37.6% 0.027 185.2)
-
Step 950
950
#1D2927
oklch(26.9% 0.017 183.7)
#37534F 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) | #50504F | 0.036 |
| Deuteranopia (no green cones) | #4B4C4F | 0.034 |
| Tritanopia (no blue cones) | #2E5452 | 0.010 |
| Achromatopsia (no color) | #4E4E4E | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37534F
#37534F
oklch(41.9% 0.034 184.9)
- #5D454A
#5D454A
oklch(41.8% 0.034 4.8)
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 #37534F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.017
- Deep Teal #00555A ΔE 0.039
- Dark Blue Green #005249 ΔE 0.044
- Dark Teal #014D4E ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Petrol #005F6A ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.055
Use #37534F 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.