#374F3F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.3% 0.04 155), rgb(55, 79, 63).
Aa
White text reads best on this color (8.92:1).
About this color
#374F3F is a dark, muted green. In OKLCH its lightness is 40%, its chroma 0.040 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 8.92:1.
| Hue family | Greens |
| Lightness | dark (40%) |
| Chroma | muted (0.040) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #374F3F |
| RGB | rgb(55, 79, 63) |
| HSL | hsl(140, 18%, 26%) |
| OKLCH | oklch(40.3% 0.04 155) |
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 #374F3F | 8.92:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #374F3F | 2.35:1 | Fails | Lc 13.5 | Not readable |
| #374F3F text on white | 8.92:1 | AAA | Lc 90.4 | Preferred for body text |
| #374F3F text on black | 2.35:1 | Fails | Lc -11.9 | 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
#B5C5BA
oklch(80.8% 0.023 155.8)
-
Step 400
400
#8FA897
oklch(70.7% 0.037 155.6)
-
Step 500
500
#73927D
oklch(63% 0.047 155.2)
-
Step 600
600
#5B7D66
oklch(55.7% 0.053 154.8)
-
Step 700
700
#4B6955
oklch(49.1% 0.048 155.1)
-
Step 800
800 (this color)
#374F3F
oklch(40.3% 0.04 155)
-
Step 900
900
#35473A
oklch(37.8% 0.032 153.3)
-
Step 950
950
#1F2922
oklch(26.9% 0.019 154.4)
#374F3F 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) | #4F4B3E | 0.037 |
| Deuteranopia (no green cones) | #4B4840 | 0.036 |
| Tritanopia (no blue cones) | #334E4A | 0.020 |
| Achromatopsia (no color) | #4A4A4A | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374F3F
#374F3F
oklch(40.3% 0.04 155)
- #564051
#564051
oklch(40.2% 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 #374F3F, 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 Blue Green #005249 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Teal #014D4E ΔE 0.049
- Deep Teal #00555A ΔE 0.052
- Pine #2B5D34 ΔE 0.055
- Charcoal #264653 ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.063
Use #374F3F 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.