#304677
Closest named color: Twilight Blue (#0A437A). oklch(40.1% 0.087 264.5), rgb(48, 70, 119).
Aa
White text reads best on this color (9.25:1).
About this color
#304677 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.087 and its hue 265°. 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 9.25:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.26:1 |
| White text | 9.25:1 |
Values
| HEX | #304677 |
| RGB | rgb(48, 70, 119) |
| HSL | hsl(221, 43%, 33%) |
| OKLCH | oklch(40.1% 0.087 264.5) |
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 #304677 | 9.25:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #304677 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #304677 text on white | 9.25:1 | AAA | Lc 91.2 | Preferred for body text |
| #304677 text on black | 2.26:1 | Fails | Lc -11.1 | 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
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EC
oklch(81% 0.065 264.5)
-
Step 400
400
#809FE2
oklch(70.6% 0.105 264.8)
-
Step 500
500
#6086DA
oklch(63% 0.134 264.5)
-
Step 600
600
#476EC8
oklch(55.5% 0.146 264.5)
-
Step 700
700
#395CAD
oklch(49.2% 0.136 264.4)
-
Step 800
800
#2F4B8C
oklch(42.6% 0.113 264.6)
-
Step 900
900 (this color)
#304677
oklch(40.1% 0.087 264.5)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#304677 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) | #314B79 | 0.015 |
| Deuteranopia (no green cones) | #284476 | 0.012 |
| Tritanopia (no blue cones) | #005158 | 0.079 |
| Achromatopsia (no color) | #474747 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304677
#304677
oklch(40.1% 0.087 264.5)
- #5C4400
#5C4400
oklch(40.2% 0.082 85.6)
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 #304677, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.037
- Cobalt #1E488F ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.047
- Dusk Blue #26538D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.061
Use #304677 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.