#37503F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.5% 0.042 154.4), rgb(55, 80, 63).
Aa
White text reads best on this color (8.81:1).
About this color
#37503F is a dark, muted green. In OKLCH its lightness is 41%, its chroma 0.042 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.028 away. White text reads best on it, at 8.81:1.
| Hue family | Greens |
| Lightness | dark (41%) |
| Chroma | muted (0.042) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #37503F |
| RGB | rgb(55, 80, 63) |
| HSL | hsl(139, 19%, 26%) |
| OKLCH | oklch(40.5% 0.042 154.4) |
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 #37503F | 8.81:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #37503F | 2.38:1 | Fails | Lc 13.8 | Not readable |
| #37503F text on white | 8.81:1 | AAA | Lc 90.1 | Preferred for body text |
| #37503F text on black | 2.38:1 | Fails | Lc -12.1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D3DCD5
oklch(88.6% 0.014 152.6)
-
Step 300
300
#B5C6BA
oklch(81% 0.025 155)
-
Step 400
400
#8EA896
oklch(70.6% 0.039 155.1)
-
Step 500
500
#72937C
oklch(63.1% 0.05 154.4)
-
Step 600
600
#5A7D65
oklch(55.6% 0.054 154.4)
-
Step 700
700
#4A6954
oklch(49% 0.049 154.6)
-
Step 800
800 (this color)
#37503F
oklch(40.5% 0.042 154.4)
-
Step 900
900
#34473A
oklch(37.7% 0.033 154.7)
-
Step 950
950
#1F2A22
oklch(27.2% 0.021 153.3)
#37503F 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) | #504C3E | 0.038 |
| Deuteranopia (no green cones) | #4C4940 | 0.037 |
| Tritanopia (no blue cones) | #334F4B | 0.021 |
| Achromatopsia (no color) | #4A4A4A | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37503F
#37503F
oklch(40.5% 0.042 154.4)
- #574152
#574152
oklch(40.5% 0.04 334.5)
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 #37503F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.028
- Dark Blue Green #005249 ΔE 0.040
- Dark Teal #014D4E ΔE 0.050
- Deep Teal #00555A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.052
- Pine #2B5D34 ΔE 0.052
- Charcoal #264653 ΔE 0.059
- Dark Green Blue #1F6357 ΔE 0.061
Use #37503F 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.