#34375B
Closest named color: Prussian Blue (#1D3557). oklch(35.2% 0.063 279), rgb(52, 55, 91).
Aa
White text reads best on this color (11.39:1).
About this color
#34375B is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.063 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.035 away. White text reads best on it, at 11.39:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.84:1 |
| White text | 11.39:1 |
Values
| HEX | #34375B |
| RGB | rgb(52, 55, 91) |
| HSL | hsl(235, 27%, 28%) |
| OKLCH | oklch(35.2% 0.063 279) |
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 #34375B | 11.39:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #34375B | 1.84:1 | Fails | Lc 7.7 | Not readable |
| #34375B text on white | 11.39:1 | AAA | Lc 96.2 | Preferred for body text |
| #34375B 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#B9BEDF
oklch(80.8% 0.047 278.5)
-
Step 400
400
#969CCF
oklch(70.7% 0.075 279.1)
-
Step 500
500
#7D83C3
oklch(63.1% 0.096 279.1)
-
Step 600
600
#676CAF
oklch(55.7% 0.104 279.2)
-
Step 700
700
#555A97
oklch(49.1% 0.097 278.6)
-
Step 800
800
#464A7A
oklch(42.8% 0.079 278.9)
-
Step 900
900 (this color)
#34375B
oklch(35.2% 0.063 279)
-
Step 950
950
#22243A
oklch(26.9% 0.041 279.3)
#34375B 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) | #2B3B5C | 0.017 |
| Deuteranopia (no green cones) | #28395A | 0.018 |
| Tritanopia (no blue cones) | #283E44 | 0.055 |
| Achromatopsia (no color) | #3A3A3A | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34375B
#34375B
oklch(35.2% 0.063 279)
- #433B0F
#433B0F
oklch(35.1% 0.062 98.8)
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 #34375B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.048
- Gunmetal #293241 ΔE 0.051
- Onyx #343A40 ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.053
- Marine Blue #01386A ΔE 0.055
- Charcoal #264653 ΔE 0.056
Use #34375B 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.