#374A42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39% 0.027 167.3), rgb(55, 74, 66).
Aa
White text reads best on this color (9.45:1).
About this color
#374A42 is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.023 away. White text reads best on it, at 9.45:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #374A42 |
| RGB | rgb(55, 74, 66) |
| HSL | hsl(155, 15%, 25%) |
| OKLCH | oklch(39% 0.027 167.3) |
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 #374A42 | 9.45:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #374A42 | 2.22:1 | Fails | Lc 12.1 | Not readable |
| #374A42 text on white | 9.45:1 | AAA | Lc 91.9 | Preferred for body text |
| #374A42 text on black | 2.22:1 | 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
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D2DCD7
oklch(88.5% 0.013 164.8)
-
Step 300
300
#B5C5BE
oklch(80.9% 0.02 167.8)
-
Step 400
400
#8EA89C
oklch(70.8% 0.034 165.8)
-
Step 500
500
#719284
oklch(63.1% 0.043 167.2)
-
Step 600
600
#597C6E
oklch(55.5% 0.045 168)
-
Step 700
700
#49695C
oklch(49.2% 0.043 167.5)
-
Step 800
800
#3C554B
oklch(42.6% 0.035 168)
-
Step 900
900 (this color)
#374A42
oklch(39% 0.027 167.3)
-
Step 950
950
#1E2925
oklch(26.9% 0.017 170.8)
#374A42 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) | #494742 | 0.028 |
| Deuteranopia (no green cones) | #464542 | 0.027 |
| Tritanopia (no blue cones) | #334A48 | 0.011 |
| Achromatopsia (no color) | #464646 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374A42
#374A42
oklch(39% 0.027 167.3)
- #513F48
#513F48
oklch(39% 0.029 347)
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 #374A42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.030
- Charcoal #264653 ΔE 0.041
- Dark Teal #014D4E ΔE 0.044
- Dark Blue Green #005249 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.051
- Deep Teal #00555A ΔE 0.053
- Onyx #343A40 ΔE 0.053
Use #374A42 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.