#304493
Closest named color: Cobalt (#1E488F). oklch(41.7% 0.132 269.2), rgb(48, 68, 147).
Aa
White text reads best on this color (8.84:1).
About this color
#304493 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.132 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.84:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #304493 |
| RGB | rgb(48, 68, 147) |
| HSL | hsl(228, 51%, 38%) |
| OKLCH | oklch(41.7% 0.132 269.2) |
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 #304493 | 8.84:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #304493 | 2.37:1 | Fails | Lc 14.1 | Not readable |
| #304493 text on white | 8.84:1 | AAA | Lc 89.9 | Fine for body text |
| #304493 text on black | 2.37:1 | Fails | Lc -12.3 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#ACBFF3
oklch(80.8% 0.077 269)
-
Step 400
400
#819CEE
oklch(70.6% 0.124 269.2)
-
Step 500
500
#6381E8
oklch(63% 0.158 269.3)
-
Step 600
600
#4C68D6
oklch(55.5% 0.171 269.4)
-
Step 700
700
#3D56BA
oklch(49.1% 0.16 269.2)
-
Step 800
800 (this color)
#304493
oklch(41.7% 0.132 269.2)
-
Step 900
900
#2C3C78
oklch(37.6% 0.104 269.6)
-
Step 950
950
#1A2446
oklch(27.1% 0.065 269.4)
#304493 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) | #114F96 | 0.035 |
| Deuteranopia (no green cones) | #004691 | 0.034 |
| Tritanopia (no blue cones) | #005764 | 0.111 |
| Achromatopsia (no color) | #4A4A4A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304493
#304493
oklch(41.7% 0.132 269.2)
- #5F4900
#5F4900
oklch(41.7% 0.085 88.8)
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 #304493, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Blueberry #464196 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.038
- Dusk Blue #26538D ΔE 0.044
- Light Navy #155084 ΔE 0.049
- Sapphire #2138AB ΔE 0.053
- Twilight Blue #0A437A ΔE 0.055
- Twilight #4E518B ΔE 0.061
Use #304493 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.