#374A3F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(38.9% 0.03 159.2), rgb(55, 74, 63).
Aa
White text reads best on this color (9.48:1).
About this color
#374A3F is a dark, muted green. In OKLCH its lightness is 39%, its chroma 0.030 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 9.48:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | muted (0.030) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #374A3F |
| RGB | rgb(55, 74, 63) |
| HSL | hsl(145, 15%, 25%) |
| OKLCH | oklch(38.9% 0.03 159.2) |
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 #374A3F | 9.48:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #374A3F | 2.21:1 | Fails | Lc 12.0 | Not readable |
| #374A3F text on white | 9.48:1 | AAA | Lc 91.9 | Preferred for body text |
| #374A3F text on black | 2.21:1 | Fails | Lc -10.5 | 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
#D2DCD6
oklch(88.5% 0.013 159.9)
-
Step 300
300
#B5C5BB
oklch(80.8% 0.022 158.5)
-
Step 400
400
#8EA899
oklch(70.7% 0.036 160)
-
Step 500
500
#72927F
oklch(63% 0.046 158.7)
-
Step 600
600
#5A7D69
oklch(55.7% 0.05 159.2)
-
Step 700
700
#496957
oklch(49% 0.047 159.4)
-
Step 800
800
#3C5647
oklch(42.7% 0.04 158.8)
-
Step 900
900 (this color)
#374A3F
oklch(38.9% 0.03 159.2)
-
Step 950
950
#1E2923
oklch(26.8% 0.019 161)
#374A3F 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) | #4A473E | 0.030 |
| Deuteranopia (no green cones) | #464540 | 0.027 |
| Tritanopia (no blue cones) | #344A47 | 0.014 |
| Achromatopsia (no color) | #464646 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374A3F
#374A3F
oklch(38.9% 0.03 159.2)
- #503F4A
#503F4A
oklch(39% 0.029 339.6)
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 #374A3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.032
- Dark Blue Green #005249 ΔE 0.044
- Charcoal #264653 ΔE 0.045
- Dark Teal #014D4E ΔE 0.045
- Onyx #343A40 ΔE 0.055
- Deep Teal #00555A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.056
Use #374A3F 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.