#334257
Closest named color: Dark Grey Blue (#29465B). oklch(37.5% 0.041 256.9), rgb(51, 66, 87).
Aa
White text reads best on this color (10.20:1).
About this color
#334257 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.041 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.016 away. White text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #334257 |
| RGB | rgb(51, 66, 87) |
| HSL | hsl(215, 26%, 27%) |
| OKLCH | oklch(37.5% 0.041 256.9) |
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 #334257 | 10.20:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #334257 | 2.05:1 | Fails | Lc 10.3 | Not readable |
| #334257 text on white | 10.20:1 | AAA | Lc 93.7 | Preferred for body text |
| #334257 text on black | 2.05:1 | Fails | Lc -8.9 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B4C2D5
oklch(80.9% 0.031 256)
-
Step 400
400
#8DA2C0
oklch(70.6% 0.05 257.3)
-
Step 500
500
#718BB0
oklch(63.1% 0.064 257.2)
-
Step 600
600
#59759B
oklch(55.6% 0.068 256.2)
-
Step 700
700
#496285
oklch(49.1% 0.064 256.9)
-
Step 800
800
#3C506C
oklch(42.7% 0.053 256.9)
-
Step 900
900 (this color)
#334257
oklch(37.5% 0.041 256.9)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#334257 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) | #3A4358 | 0.011 |
| Deuteranopia (no green cones) | #363F57 | 0.010 |
| Tritanopia (no blue cones) | #274749 | 0.037 |
| Achromatopsia (no color) | #414141 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334257
#334257
oklch(37.5% 0.041 256.9)
- #4E3E28
#4E3E28
oklch(37.5% 0.041 74.8)
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 #334257, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.016
- Charcoal #264653 ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.039
- Onyx #343A40 ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.055
- Midnight Green #073B4C ΔE 0.056
Use #334257 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.