#33404F
Closest named color: Charcoal (#264653). oklch(36.6% 0.031 252.3), rgb(51, 64, 79).
Aa
White text reads best on this color (10.56:1).
About this color
#33404F is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.031 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.023 away. White text reads best on it, at 10.56:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #33404F |
| RGB | rgb(51, 64, 79) |
| HSL | hsl(212, 22%, 25%) |
| OKLCH | oklch(36.6% 0.031 252.3) |
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 #33404F | 10.56:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #33404F | 1.98:1 | Fails | Lc 9.4 | Not readable |
| #33404F text on white | 10.56:1 | AAA | Lc 94.5 | Preferred for body text |
| #33404F text on black | 1.98:1 | Fails | Lc -8.1 | 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
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B6C2D0
oklch(80.9% 0.024 252.2)
-
Step 400
400
#90A3B8
oklch(70.8% 0.038 251)
-
Step 500
500
#758CA6
oklch(63.1% 0.047 251.7)
-
Step 600
600
#5D7691
oklch(55.6% 0.051 250.7)
-
Step 700
700
#4D637C
oklch(49.2% 0.048 252)
-
Step 800
800
#3F5165
oklch(42.8% 0.04 251.4)
-
Step 900
900 (this color)
#33404F
oklch(36.6% 0.031 252.3)
-
Step 950
950
#202730
oklch(27% 0.02 254.8)
#33404F 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) | #3A4050 | 0.011 |
| Deuteranopia (no green cones) | #373E4F | 0.008 |
| Tritanopia (no blue cones) | #2A4345 | 0.026 |
| Achromatopsia (no color) | #3F3F3F | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33404F
#33404F
oklch(36.6% 0.031 252.3)
- #493C2D
#493C2D
oklch(36.6% 0.03 70.7)
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 #33404F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.023
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal Grey #3C4142 ΔE 0.027
- Onyx #343A40 ΔE 0.028
- 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 #33404F 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.