#33404E
Closest named color: Charcoal (#264653). oklch(36.6% 0.03 250.5), rgb(51, 64, 78).
Aa
White text reads best on this color (10.58:1).
About this color
#33404E is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Charcoal (#264653), ΔE 0.023 away. White text reads best on it, at 10.58:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Charcoal (#264653) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #33404E |
| RGB | rgb(51, 64, 78) |
| HSL | hsl(211, 21%, 25%) |
| OKLCH | oklch(36.6% 0.03 250.5) |
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 #33404E | 10.58:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #33404E | 1.98:1 | Fails | Lc 9.4 | Not readable |
| #33404E text on white | 10.58:1 | AAA | Lc 94.5 | Preferred for body text |
| #33404E text on black | 1.98:1 | Fails | Lc -8.0 | 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
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B6C2CF
oklch(80.9% 0.023 250.3)
-
Step 400
400
#91A3B7
oklch(70.8% 0.036 251.1)
-
Step 500
500
#758CA5
oklch(63.1% 0.046 250.7)
-
Step 600
600
#5E7690
oklch(55.7% 0.049 250.8)
-
Step 700
700
#4D637A
oklch(49.1% 0.046 249.9)
-
Step 800
800
#3F5163
oklch(42.7% 0.038 248.7)
-
Step 900
900 (this color)
#33404E
oklch(36.6% 0.03 250.5)
-
Step 950
950
#20272F
oklch(26.9% 0.018 251.9)
#33404E 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) | #3B404F | 0.012 |
| Deuteranopia (no green cones) | #383D4E | 0.012 |
| Tritanopia (no blue cones) | #2B4345 | 0.024 |
| Achromatopsia (no color) | #3F3F3F | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33404E
#33404E
oklch(36.6% 0.03 250.5)
- #493C2E
#493C2E
oklch(36.6% 0.029 68.8)
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 #33404E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.026
- Onyx #343A40 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.033
- Dark Slate Gray #2F4F4F ΔE 0.049
- Midnight Green #073B4C ΔE 0.050
- Gunmetal #293241 ΔE 0.051
Use #33404E 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.