#304EB6
Closest named color: Blue Blue (#2242C7). oklch(46.5% 0.168 267.2), rgb(48, 78, 182).
Aa
White text reads best on this color (7.26:1).
About this color
#304EB6 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.168 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.042 away. White text reads best on it, at 7.26:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #304EB6 |
| RGB | rgb(48, 78, 182) |
| HSL | hsl(227, 58%, 45%) |
| OKLCH | oklch(46.5% 0.168 267.2) |
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 #304EB6 | 7.26:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #304EB6 | 2.89:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #304EB6 text on white | 7.26:1 | AAA | Lc 84.7 | Fine for body text |
| #304EB6 text on black | 2.89:1 | Fails | Lc -17.3 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7C9DF2
oklch(70.7% 0.13 267)
-
Step 500
500
#5D82ED
oklch(63.2% 0.166 267.2)
-
Step 600
600
#4468DC
oklch(55.6% 0.182 267.2)
-
Step 700
700 (this color)
#304EB6
oklch(46.5% 0.168 267.2)
-
Step 800
800
#2D479A
oklch(42.7% 0.139 267.2)
-
Step 900
900
#283C7B
oklch(37.6% 0.11 267.6)
-
Step 950
950
#172448
oklch(27% 0.069 266.8)
#304EB6 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) | #005DBA | 0.041 |
| Deuteranopia (no green cones) | #0051B4 | 0.028 |
| Tritanopia (no blue cones) | #00687A | 0.135 |
| Achromatopsia (no color) | #575757 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304EB6
#304EB6
oklch(46.5% 0.168 267.2)
- #705500
#705500
oklch(46.5% 0.095 87.2)
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 #304EB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.042
- Majorelle Blue #3F37C9 ΔE 0.057
- Sapphire #2138AB ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blueberry #464196 ΔE 0.063
- Cobalt #1E488F ΔE 0.068
- Blurple #5539CC ΔE 0.070
- Dusk Blue #26538D ΔE 0.070
Use #304EB6 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.