#34394B
Closest named color: Onyx (#343A40). oklch(34.8% 0.032 272.6), rgb(52, 57, 75).
Aa
White text reads best on this color (11.45:1).
About this color
#34394B is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.032 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.021 away. White text reads best on it, at 11.45:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.83:1 |
| White text | 11.45:1 |
Values
| HEX | #34394B |
| RGB | rgb(52, 57, 75) |
| HSL | hsl(227, 18%, 25%) |
| OKLCH | oklch(34.8% 0.032 272.6) |
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 #34394B | 11.45:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #34394B | 1.83:1 | Fails | Lc 7.5 | Not readable |
| #34394B text on white | 11.45:1 | AAA | Lc 96.4 | Preferred for body text |
| #34394B text on black | 1.83:1 | Fails | Lc 0.0 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D6D9E2
oklch(88.6% 0.013 271.3)
-
Step 300
300
#BBC0D1
oklch(80.9% 0.024 272.8)
-
Step 400
400
#98A0B9
oklch(70.8% 0.038 271.4)
-
Step 500
500
#7F88A8
oklch(63.1% 0.049 272.6)
-
Step 600
600
#687293
oklch(55.6% 0.053 271.5)
-
Step 700
700
#575F7E
oklch(49.1% 0.051 273.2)
-
Step 800
800
#474E66
oklch(42.7% 0.041 271.9)
-
Step 900
900 (this color)
#34394B
oklch(34.8% 0.032 272.6)
-
Step 950
950
#232631
oklch(27% 0.021 273)
#34394B 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) | #343B4C | 0.006 |
| Deuteranopia (no green cones) | #32394B | 0.003 |
| Tritanopia (no blue cones) | #2E3C3F | 0.028 |
| Achromatopsia (no color) | #3A3A3A | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34394B
#34394B
oklch(34.8% 0.032 272.6)
- #403A26
#403A26
oklch(34.9% 0.033 93.4)
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 #34394B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.028
- Gunmetal #293241 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.038
- Charcoal #264653 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.044
Use #34394B 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.