#303C96
Closest named color: Blueberry (#464196). oklch(40.3% 0.147 272.2), rgb(48, 60, 150).
Aa
White text reads best on this color (9.49:1).
About this color
#303C96 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.147 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.036 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #303C96 |
| RGB | rgb(48, 60, 150) |
| HSL | hsl(233, 52%, 39%) |
| OKLCH | oklch(40.3% 0.147 272.2) |
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 #303C96 | 9.49:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #303C96 | 2.21:1 | Fails | Lc 12.4 | Not readable |
| #303C96 text on white | 9.49:1 | AAA | Lc 91.5 | Preferred for body text |
| #303C96 text on black | 2.21:1 | Fails | Lc -10.8 | 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 800.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8FA
oklch(88.5% 0.048 272.4)
-
Step 300
300
#ADBEF9
oklch(81% 0.086 271.9)
-
Step 400
400
#839AF6
oklch(70.8% 0.137 271.9)
-
Step 500
500
#677DF2
oklch(63.1% 0.176 272.4)
-
Step 600
600
#5063E1
oklch(55.6% 0.191 272.2)
-
Step 700
700
#4251C3
oklch(49.1% 0.177 272.4)
-
Step 800
800 (this color)
#303C96
oklch(40.3% 0.147 272.2)
-
Step 900
900
#2E3A7D
oklch(37.7% 0.114 272.2)
-
Step 950
950
#1B2249
oklch(26.9% 0.072 272.9)
#303C96 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) | #004A99 | 0.044 |
| Deuteranopia (no green cones) | #004194 | 0.037 |
| Tritanopia (no blue cones) | #005263 | 0.120 |
| Achromatopsia (no color) | #464646 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303C96
#303C96
oklch(40.3% 0.147 272.2)
- #584600
#584600
oklch(40.2% 0.082 92)
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 #303C96, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.036
- Cobalt #1E488F ΔE 0.037
- Sapphire #2138AB ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight Blue #0A437A ΔE 0.062
- Dusk Blue #26538D ΔE 0.065
- Light Navy #155084 ΔE 0.067
- Indigo Blue #3A18B1 ΔE 0.073
Use #303C96 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.