#304491
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.129 269.1), rgb(48, 68, 145).
Aa
White text reads best on this color (8.89:1).
About this color
#304491 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.129 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #304491 |
| RGB | rgb(48, 68, 145) |
| HSL | hsl(228, 50%, 38%) |
| OKLCH | oklch(41.5% 0.129 269.1) |
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 #304491 | 8.89:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #304491 | 2.36:1 | Fails | Lc 13.9 | Not readable |
| #304491 text on white | 8.89:1 | AAA | Lc 90.1 | Preferred for body text |
| #304491 text on black | 2.36:1 | Fails | Lc -12.2 | 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
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F6
oklch(88.6% 0.042 269)
-
Step 300
300
#ADBFF2
oklch(80.9% 0.075 269.5)
-
Step 400
400
#829DEC
oklch(70.8% 0.12 268.9)
-
Step 500
500
#6482E6
oklch(63.1% 0.154 269.1)
-
Step 600
600
#4C69D4
oklch(55.6% 0.168 269)
-
Step 700
700
#3E57B8
oklch(49.2% 0.156 269.1)
-
Step 800
800 (this color)
#304491
oklch(41.5% 0.129 269.1)
-
Step 900
900
#2C3D76
oklch(37.7% 0.099 268.8)
-
Step 950
950
#1A2445
oklch(27% 0.063 269.2)
#304491 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) | #154E94 | 0.032 |
| Deuteranopia (no green cones) | #00468F | 0.034 |
| Tritanopia (no blue cones) | #005664 | 0.107 |
| Achromatopsia (no color) | #4A4A4A | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304491
#304491
oklch(41.5% 0.129 269.1)
- #5E4900
#5E4900
oklch(41.6% 0.085 89.8)
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 #304491, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Blueberry #464196 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.038
- Dusk Blue #26538D ΔE 0.043
- Light Navy #155084 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.052
- Sapphire #2138AB ΔE 0.056
- Twilight #4E518B ΔE 0.061
Use #304491 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.