#304477
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.09 266.2), rgb(48, 68, 119).
Aa
White text reads best on this color (9.46:1).
About this color
#304477 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.090 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.46:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.46:1 |
Values
| HEX | #304477 |
| RGB | rgb(48, 68, 119) |
| HSL | hsl(223, 43%, 33%) |
| OKLCH | oklch(39.7% 0.09 266.2) |
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 #304477 | 9.46:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #304477 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #304477 text on white | 9.46:1 | AAA | Lc 91.7 | Preferred for body text |
| #304477 text on black | 2.21:1 | Fails | Lc -10.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#ACC0ED
oklch(80.8% 0.068 266.1)
-
Step 400
400
#819FE4
oklch(70.8% 0.107 265.8)
-
Step 500
500
#6285DD
oklch(63.1% 0.139 266.2)
-
Step 600
600
#4A6DCA
oklch(55.6% 0.149 266.2)
-
Step 700
700
#3B5AAF
oklch(49% 0.14 266.3)
-
Step 800
800
#314A8E
oklch(42.7% 0.116 266.4)
-
Step 900
900 (this color)
#304477
oklch(39.7% 0.09 266.2)
-
Step 950
950
#192542
oklch(27% 0.057 265.8)
#304477 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) | #2E4979 | 0.014 |
| Deuteranopia (no green cones) | #254376 | 0.014 |
| Tritanopia (no blue cones) | #004F57 | 0.081 |
| Achromatopsia (no color) | #464646 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304477
#304477
oklch(39.7% 0.09 266.2)
- #5A4300
#5A4300
oklch(39.7% 0.081 86.3)
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 #304477, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Light Navy #155084 ΔE 0.041
- Cobalt #1E488F ΔE 0.042
- Dusk Blue #26538D ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.053
- Blueberry #464196 ΔE 0.063
Use #304477 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.