#203366
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.093 266.2), rgb(32, 51, 102).
Aa
White text reads best on this color (12.16:1).
About this color
#203366 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.093 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.025 away. White text reads best on it, at 12.16:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.72:1 |
| White text | 12.16:1 |
Values
| HEX | #203366 |
| RGB | rgb(32, 51, 102) |
| HSL | hsl(224, 52%, 26%) |
| OKLCH | oklch(33.5% 0.093 266.2) |
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 #203366 | 12.16:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #203366 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #203366 text on white | 12.16:1 | AAA | Lc 97.5 | Preferred for body text |
| #203366 text on black | 1.72:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ACC0EF
oklch(80.9% 0.07 266.8)
-
Step 400
400
#809EE6
oklch(70.6% 0.111 266.3)
-
Step 500
500
#6185DF
oklch(63.2% 0.142 266)
-
Step 600
600
#486CCD
oklch(55.5% 0.155 266.2)
-
Step 700
700
#3A5AB1
oklch(49.1% 0.143 266.1)
-
Step 800
800
#304A90
oklch(42.7% 0.12 266.1)
-
Step 900
900 (this color)
#203366
oklch(33.5% 0.093 266.2)
-
Step 950
950
#192543
oklch(27% 0.058 266.1)
#203366 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) | #193968 | 0.018 |
| Deuteranopia (no green cones) | #0B3365 | 0.020 |
| Tritanopia (no blue cones) | #003F47 | 0.078 |
| Achromatopsia (no color) | #363636 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203366
#203366
oklch(33.5% 0.093 266.2)
- #463300
#463300
oklch(33.4% 0.068 85.7)
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 #203366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.029
- Marine #042E60 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.056
- Midnight Green #073B4C ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.064
- Gunmetal #293241 ΔE 0.066
Use #203366 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.