#34376B
Closest named color: Prussian Blue (#1D3557). oklch(36.2% 0.089 278.5), rgb(52, 55, 107).
Aa
White text reads best on this color (11.02:1).
About this color
#34376B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.089 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.049 away. White text reads best on it, at 11.02:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #34376B |
| RGB | rgb(52, 55, 107) |
| HSL | hsl(237, 35%, 31%) |
| OKLCH | oklch(36.2% 0.089 278.5) |
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 #34376B | 11.02:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #34376B | 1.90:1 | Fails | Lc 8.5 | Not readable |
| #34376B text on white | 11.02:1 | AAA | Lc 95.4 | Preferred for body text |
| #34376B text on black | 1.90:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F2
oklch(88.4% 0.037 278.9)
-
Step 300
300
#B6BDEC
oklch(80.9% 0.067 278.2)
-
Step 400
400
#929AE2
oklch(70.8% 0.105 278.5)
-
Step 500
500
#787FDA
oklch(63.1% 0.136 278.4)
-
Step 600
600
#6266C7
oklch(55.5% 0.148 278.7)
-
Step 700
700
#5155AC
oklch(49.2% 0.136 278.1)
-
Step 800
800
#42468C
oklch(42.8% 0.114 278)
-
Step 900
900 (this color)
#34376B
oklch(36.2% 0.089 278.5)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#34376B 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) | #213E6D | 0.030 |
| Deuteranopia (no green cones) | #1D3A6A | 0.030 |
| Tritanopia (no blue cones) | #1F424B | 0.078 |
| Achromatopsia (no color) | #3C3C3C | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34376B
#34376B
oklch(36.2% 0.089 278.5)
- #483E00
#483E00
oklch(36.3% 0.075 99)
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 #34376B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.049
- Marine Blue #01386A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.065
- Marine #042E60 ΔE 0.067
- Charcoal #264653 ΔE 0.072
Use #34376B 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.