#374151
Closest named color: Dark Grey Blue (#29465B). oklch(37.3% 0.031 259.7), rgb(55, 65, 81).
Aa
White text reads best on this color (10.30:1).
About this color
#374151 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.031 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.30:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #374151 |
| RGB | rgb(55, 65, 81) |
| HSL | hsl(217, 19%, 27%) |
| OKLCH | oklch(37.3% 0.031 259.7) |
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 #374151 | 10.30:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #374151 | 2.03:1 | Fails | Lc 10.0 | Not readable |
| #374151 text on white | 10.30:1 | AAA | Lc 93.9 | Preferred for body text |
| #374151 text on black | 2.03:1 | Fails | Lc -8.6 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B8C1D0
oklch(80.9% 0.023 260.7)
-
Step 400
400
#93A1B8
oklch(70.6% 0.037 260.4)
-
Step 500
500
#798AA6
oklch(63% 0.047 260.4)
-
Step 600
600
#627492
oklch(55.6% 0.052 260.5)
-
Step 700
700
#51617C
oklch(49% 0.048 260.8)
-
Step 800
800
#425065
oklch(42.8% 0.039 258.3)
-
Step 900
900 (this color)
#374151
oklch(37.3% 0.031 259.7)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#374151 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) | #3C4252 | 0.009 |
| Deuteranopia (no green cones) | #393F51 | 0.007 |
| Tritanopia (no blue cones) | #304446 | 0.027 |
| Achromatopsia (no color) | #404040 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374151
#374151
oklch(37.3% 0.031 259.7)
- #493F2E
#493F2E
oklch(37.3% 0.031 80.7)
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 #374151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.025
- Charcoal Grey #3C4142 ΔE 0.027
- Onyx #343A40 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.047
- Gunmetal #293241 ΔE 0.058
- Midnight Green #073B4C ΔE 0.058
Use #374151 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.