#33404B
Closest named color: Charcoal Grey (#3C4142). oklch(36.4% 0.026 244.1), rgb(51, 64, 75).
Aa
White text reads best on this color (10.62:1).
About this color
#33404B is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.021 away. White text reads best on it, at 10.62:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.97:1 |
| White text | 10.62:1 |
Values
| HEX | #33404B |
| RGB | rgb(51, 64, 75) |
| HSL | hsl(208, 19%, 25%) |
| OKLCH | oklch(36.4% 0.026 244.1) |
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 #33404B | 10.62:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #33404B | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #33404B text on white | 10.62:1 | AAA | Lc 94.7 | Preferred for body text |
| #33404B text on black | 1.97:1 | Fails | Lc -7.9 | 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 900.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B7C2CC
oklch(80.9% 0.019 245.4)
-
Step 400
400
#91A3B3
oklch(70.7% 0.031 245.1)
-
Step 500
500
#768DA0
oklch(63.2% 0.039 243.3)
-
Step 600
600
#5E768B
oklch(55.5% 0.043 245.1)
-
Step 700
700
#4E6476
oklch(49.2% 0.039 243.3)
-
Step 800
800
#405160
oklch(42.7% 0.033 245.3)
-
Step 900
900 (this color)
#33404B
oklch(36.4% 0.026 244.1)
-
Step 950
950
#20272E
oklch(26.9% 0.016 248.4)
#33404B 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) | #3C404C | 0.014 |
| Deuteranopia (no green cones) | #393D4B | 0.013 |
| Tritanopia (no blue cones) | #2C4344 | 0.021 |
| Achromatopsia (no color) | #3E3E3E | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33404B
#33404B
oklch(36.4% 0.026 244.1)
- #483C30
#483C30
oklch(36.5% 0.026 66.9)
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 #33404B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.021
- Onyx #343A40 ΔE 0.023
- Charcoal #264653 ΔE 0.024
- Dark Grey Blue #29465B ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.033
- Dark Slate Gray #2F4F4F ΔE 0.048
- Gunmetal #293241 ΔE 0.050
- Midnight Green #073B4C ΔE 0.050
Use #33404B 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.