#304CAF
Closest named color: Blue Blue (#2242C7). oklch(45.5% 0.161 267.6), rgb(48, 76, 175).
Aa
White text reads best on this color (7.55:1).
About this color
#304CAF is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.161 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.047 away. White text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.77:1 |
| White text | 7.55:1 |
Values
| HEX | #304CAF |
| RGB | rgb(48, 76, 175) |
| HSL | hsl(227, 57%, 44%) |
| OKLCH | oklch(45.5% 0.161 267.6) |
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 #304CAF | 7.55:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #304CAF | 2.77:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #304CAF text on white | 7.55:1 | AAA | Lc 85.8 | Fine for body text |
| #304CAF text on black | 2.77:1 | Fails | Lc -16.2 | Dividers and decoration only |
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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FD
oklch(88.6% 0.052 267.4)
-
Step 300
300
#A6BFFE
oklch(80.9% 0.094 267.6)
-
Step 400
400
#779BFE
oklch(70.7% 0.151 267.4)
-
Step 500
500
#577EFC
oklch(63.1% 0.192 267.7)
-
Step 600
600
#3F63EC
oklch(55.6% 0.21 267.7)
-
Step 700
700
#3251CD
oklch(49.1% 0.195 267.6)
-
Step 800
800 (this color)
#304CAF
oklch(45.5% 0.161 267.6)
-
Step 900
900
#253A83
oklch(37.7% 0.125 267.8)
-
Step 950
950
#15234D
oklch(27% 0.08 267.1)
#304CAF 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) | #005AB2 | 0.040 |
| Deuteranopia (no green cones) | #004FAD | 0.029 |
| Tritanopia (no blue cones) | #006476 | 0.128 |
| Achromatopsia (no color) | #545454 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304CAF
#304CAF
oklch(45.5% 0.161 267.6)
- #6D5300
#6D5300
oklch(45.7% 0.093 87.6)
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 #304CAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Sapphire #2138AB ΔE 0.054
- Cobalt #1E488F ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.060
- Dusk Blue #26538D ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.068
Use #304CAF 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.