#37504A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.9% 0.032 178.1), rgb(55, 80, 74).
Aa
White text reads best on this color (8.71:1).
About this color
#37504A is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.032 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.013 away. White text reads best on it, at 8.71:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.40:1 |
| White text | 8.71:1 |
Values
| HEX | #37504A |
| RGB | rgb(55, 80, 74) |
| HSL | hsl(166, 19%, 26%) |
| OKLCH | oklch(40.9% 0.032 178.1) |
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 #37504A | 8.71:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #37504A | 2.40:1 | Fails | Lc 14.1 | Not readable |
| #37504A text on white | 8.71:1 | AAA | Lc 89.9 | Fine for body text |
| #37504A text on black | 2.40:1 | Fails | Lc -12.4 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DBD9
oklch(88.4% 0.01 181.4)
-
Step 300
300
#B5C5C0
oklch(81% 0.019 175.2)
-
Step 400
400
#8DA7A0
oklch(70.6% 0.031 177.3)
-
Step 500
500
#719189
oklch(63% 0.038 178)
-
Step 600
600
#597C73
oklch(55.7% 0.042 177)
-
Step 700
700
#496861
oklch(49.1% 0.038 179.1)
-
Step 800
800 (this color)
#37504A
oklch(40.9% 0.032 178.1)
-
Step 900
900
#334641
oklch(37.6% 0.026 176.9)
-
Step 950
950
#1E2926
oklch(26.9% 0.016 176.5)
#37504A 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) | #4E4D4A | 0.034 |
| Deuteranopia (no green cones) | #494A4A | 0.031 |
| Tritanopia (no blue cones) | #30514E | 0.009 |
| Achromatopsia (no color) | #4B4B4B | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37504A
#37504A
oklch(40.9% 0.032 178.1)
- #59434A
#59434A
oklch(40.9% 0.032 357.7)
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 #37504A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.013
- Dark Blue Green #005249 ΔE 0.041
- Deep Teal #00555A ΔE 0.042
- Dark Teal #014D4E ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.046
- Charcoal #264653 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.059
Use #37504A 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.