#37585D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.7% 0.039 207.9), rgb(55, 88, 93).
Aa
White text reads best on this color (7.73:1).
About this color
#37585D is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.039 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.035 away. White text reads best on it, at 7.73:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #37585D |
| RGB | rgb(55, 88, 93) |
| HSL | hsl(188, 26%, 29%) |
| OKLCH | oklch(43.7% 0.039 207.9) |
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 #37585D | 7.73:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #37585D | 2.71:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #37585D text on white | 7.73:1 | AAA | Lc 86.8 | Fine for body text |
| #37585D text on black | 2.71:1 | Fails | Lc -15.3 | 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
#B0C5C8
oklch(80.8% 0.023 207.1)
-
Step 400
400
#87A7AD
oklch(70.6% 0.036 210.3)
-
Step 500
500
#689298
oklch(63.1% 0.047 207.1)
-
Step 600
600
#4E7C83
oklch(55.6% 0.051 208)
-
Step 700
700
#3F686F
oklch(49% 0.047 209.5)
-
Step 800
800 (this color)
#37585D
oklch(43.7% 0.039 207.9)
-
Step 900
900
#2E464A
oklch(37.6% 0.03 209)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#37585D 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) | #53565D | 0.038 |
| Deuteranopia (no green cones) | #4C515D | 0.034 |
| Tritanopia (no blue cones) | #285B59 | 0.020 |
| Achromatopsia (no color) | #535353 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37585D
#37585D
oklch(43.7% 0.039 207.9)
- #664A46
#664A46
oklch(43.8% 0.039 28)
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 #37585D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.035
- Petrol #005F6A ΔE 0.038
- Deep Teal #00555A ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.046
- Dark Aqua #05696B ΔE 0.055
- Dark Blue Green #005249 ΔE 0.058
- Dusty Grape #545775 ΔE 0.060
Use #37585D 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.