#203779
Closest named color: Twilight Blue (#0A437A). oklch(35.9% 0.116 266.2), rgb(32, 55, 121).
Aa
White text reads best on this color (11.14:1).
About this color
#203779 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.116 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 11.14:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.88:1 |
| White text | 11.14:1 |
Values
| HEX | #203779 |
| RGB | rgb(32, 55, 121) |
| HSL | hsl(224, 58%, 30%) |
| OKLCH | oklch(35.9% 0.116 266.2) |
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 #203779 | 11.14:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #203779 | 1.88:1 | Fails | Lc 8.5 | Not readable |
| #203779 text on white | 11.14:1 | AAA | Lc 95.4 | Preferred for body text |
| #203779 text on black | 1.88:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#789DF7
oklch(70.8% 0.139 266)
-
Step 500
500
#5681F4
oklch(63.1% 0.178 266)
-
Step 600
600
#3E67E3
oklch(55.6% 0.194 266.3)
-
Step 700
700
#3055C5
oklch(49.1% 0.18 266)
-
Step 800
800
#28469F
oklch(42.6% 0.149 266.1)
-
Step 900
900 (this color)
#203779
oklch(35.9% 0.116 266.2)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#203779 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) | #0B407B | 0.027 |
| Deuteranopia (no green cones) | #003778 | 0.023 |
| Tritanopia (no blue cones) | #004752 | 0.094 |
| Achromatopsia (no color) | #3B3B3B | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203779
#203779
oklch(35.9% 0.116 266.2)
- #4E3900
#4E3900
oklch(35.8% 0.073 85.4)
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 #203779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Marine Blue #01386A ΔE 0.036
- Cobalt #1E488F ΔE 0.057
- Marine #042E60 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.070
- Light Navy #155084 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.077
Use #203779 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.