#34394E
Closest named color: Onyx (#343A40). oklch(34.9% 0.037 274), rgb(52, 57, 78).
Aa
White text reads best on this color (11.40:1).
About this color
#34394E is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.037 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.026 away. White text reads best on it, at 11.40:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.84:1 |
| White text | 11.40:1 |
Values
| HEX | #34394E |
| RGB | rgb(52, 57, 78) |
| HSL | hsl(228, 20%, 25%) |
| OKLCH | oklch(34.9% 0.037 274) |
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 #34394E | 11.40:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #34394E | 1.84:1 | Fails | Lc 7.6 | Not readable |
| #34394E text on white | 11.40:1 | AAA | Lc 96.3 | Preferred for body text |
| #34394E text on black | 1.84:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D6D9E4
oklch(88.6% 0.015 273.8)
-
Step 300
300
#BBC0D3
oklch(81% 0.027 274)
-
Step 400
400
#979FBD
oklch(70.6% 0.045 273.5)
-
Step 500
500
#7E87AD
oklch(63% 0.058 274.3)
-
Step 600
600
#687198
oklch(55.6% 0.062 274.2)
-
Step 700
700
#565E82
oklch(49% 0.059 274.4)
-
Step 800
800
#474D6A
oklch(42.7% 0.049 275.1)
-
Step 900
900 (this color)
#34394E
oklch(34.9% 0.037 274)
-
Step 950
950
#232632
oklch(27.1% 0.023 273.8)
#34394E 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) | #333B4F | 0.006 |
| Deuteranopia (no green cones) | #31394D | 0.005 |
| Tritanopia (no blue cones) | #2D3D40 | 0.034 |
| Achromatopsia (no color) | #3A3A3A | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34394E
#34394E
oklch(34.9% 0.037 274)
- #413A23
#413A23
oklch(34.9% 0.038 93.1)
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 #34394E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.029
- Gunmetal #293241 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.042
- Charcoal #264653 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.044
Use #34394E 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.