#37564E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.6% 0.039 176.3), rgb(55, 86, 78).
Aa
White text reads best on this color (8.06:1).
About this color
#37564E is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.039 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 8.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #37564E |
| RGB | rgb(55, 86, 78) |
| HSL | hsl(165, 22%, 28%) |
| OKLCH | oklch(42.6% 0.039 176.3) |
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 #37564E | 8.06:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #37564E | 2.60:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #37564E text on white | 8.06:1 | AAA | Lc 87.9 | Fine for body text |
| #37564E text on black | 2.60:1 | Fails | Lc -14.3 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D1DCD9
oklch(88.5% 0.013 178)
-
Step 300
300
#B2C6C0
oklch(81% 0.023 175.8)
-
Step 400
400
#89A8A0
oklch(70.6% 0.036 177.8)
-
Step 500
500
#6B9388
oklch(63% 0.047 175.9)
-
Step 600
600
#527D72
oklch(55.5% 0.051 176.5)
-
Step 700
700
#436A60
oklch(49.2% 0.047 176.3)
-
Step 800
800 (this color)
#37564E
oklch(42.6% 0.039 176.3)
-
Step 900
900
#304741
oklch(37.7% 0.03 176.6)
-
Step 950
950
#1C2A26
oklch(27.1% 0.02 175.1)
#37564E 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) | #54524E | 0.042 |
| Deuteranopia (no green cones) | #4E4E4F | 0.040 |
| Tritanopia (no blue cones) | #2E5754 | 0.012 |
| Achromatopsia (no color) | #505050 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37564E
#37564E
oklch(42.6% 0.039 176.3)
- #61464F
#61464F
oklch(42.7% 0.039 357.1)
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 #37564E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Dark Green Blue #1F6357 ΔE 0.042
- Deep Teal #00555A ΔE 0.042
- Dark Blue Green #005249 ΔE 0.045
- Petrol #005F6A ΔE 0.051
- Dark Teal #014D4E ΔE 0.055
- Pine #2B5D34 ΔE 0.055
- Charcoal #264653 ΔE 0.062
Use #37564E 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.