#333860
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.069 276.9), rgb(51, 56, 96).
Aa
White text reads best on this color (11.19:1).
About this color
#333860 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.069 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.037 away. White text reads best on it, at 11.19:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.87:1 |
| White text | 11.19:1 |
Values
| HEX | #333860 |
| RGB | rgb(51, 56, 96) |
| HSL | hsl(233, 31%, 29%) |
| OKLCH | oklch(35.6% 0.069 276.9) |
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 #333860 | 11.19:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #333860 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #333860 text on white | 11.19:1 | AAA | Lc 95.8 | Preferred for body text |
| #333860 text on black | 1.87:1 | 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
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8ED
oklch(88.6% 0.029 277.2)
-
Step 300
300
#B7BEE3
oklch(80.8% 0.053 276.7)
-
Step 400
400
#939CD5
oklch(70.7% 0.084 277.1)
-
Step 500
500
#7983C9
oklch(63.1% 0.106 276.7)
-
Step 600
600
#636BB6
oklch(55.5% 0.116 277.3)
-
Step 700
700
#52599D
oklch(49.1% 0.108 277.2)
-
Step 800
800
#43497F
oklch(42.6% 0.089 277.1)
-
Step 900
900 (this color)
#333860
oklch(35.6% 0.069 276.9)
-
Step 950
950
#21243C
oklch(27% 0.045 277.5)
#333860 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) | #2A3D62 | 0.018 |
| Deuteranopia (no green cones) | #26395F | 0.019 |
| Tritanopia (no blue cones) | #244047 | 0.061 |
| Achromatopsia (no color) | #3B3B3B | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333860
#333860
oklch(35.6% 0.069 276.9)
- #463C06
#463C06
oklch(35.6% 0.07 97.8)
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 #333860, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Marine Blue #01386A ΔE 0.051
- Charcoal #264653 ΔE 0.057
- Gunmetal #293241 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.059
- Onyx #343A40 ΔE 0.059
Use #333860 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.