#374C42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.6% 0.031 164.1), rgb(55, 76, 66).
Aa
White text reads best on this color (9.23:1).
About this color
#374C42 is a dark, muted green. In OKLCH its lightness is 40%, its chroma 0.031 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.021 away. White text reads best on it, at 9.23:1.
| Hue family | Greens |
| Lightness | dark (40%) |
| Chroma | muted (0.031) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #374C42 |
| RGB | rgb(55, 76, 66) |
| HSL | hsl(151, 16%, 26%) |
| OKLCH | oklch(39.6% 0.031 164.1) |
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 #374C42 | 9.23:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #374C42 | 2.27:1 | Fails | Lc 12.7 | Not readable |
| #374C42 text on white | 9.23:1 | AAA | Lc 91.3 | Preferred for body text |
| #374C42 text on black | 2.27:1 | Fails | Lc -11.1 | 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 900.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D2DCD7
oklch(88.5% 0.013 164.8)
-
Step 300
300
#B4C6BD
oklch(81% 0.023 164.4)
-
Step 400
400
#8CA89A
oklch(70.6% 0.037 163.7)
-
Step 500
500
#6F9382
oklch(63.1% 0.048 164.4)
-
Step 600
600
#567D6B
oklch(55.5% 0.052 164.3)
-
Step 700
700
#466A59
oklch(49.2% 0.05 163.5)
-
Step 800
800
#3A5649
oklch(42.7% 0.04 164.1)
-
Step 900
900 (this color)
#374C42
oklch(39.6% 0.031 164.1)
-
Step 950
950
#1E2A24
oklch(27.2% 0.02 163)
#374C42 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) | #4B4942 | 0.031 |
| Deuteranopia (no green cones) | #474643 | 0.030 |
| Tritanopia (no blue cones) | #334C49 | 0.012 |
| Achromatopsia (no color) | #474747 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374C42
#374C42
oklch(39.6% 0.031 164.1)
- #53404B
#53404B
oklch(39.6% 0.031 343)
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 #374C42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.021
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Blue Green #005249 ΔE 0.042
- Dark Teal #014D4E ΔE 0.044
- Charcoal #264653 ΔE 0.045
- Deep Teal #00555A ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.055
- Onyx #343A40 ΔE 0.060
Use #374C42 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.