#304CC4
Closest named color: Blue Blue (#2242C7). oklch(47.3% 0.19 268), rgb(48, 76, 196).
Aa
White text reads best on this color (7.10:1).
About this color
#304CC4 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.190 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.029 away. White text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #304CC4 |
| RGB | rgb(48, 76, 196) |
| HSL | hsl(229, 61%, 48%) |
| OKLCH | oklch(47.3% 0.19 268) |
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 #304CC4 | 7.10:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #304CC4 | 2.95:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #304CC4 text on white | 7.10:1 | AAA | Lc 84.0 | Fine for body text |
| #304CC4 text on black | 2.95:1 | Fails | Lc -18.0 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A7BFFD
oklch(80.9% 0.092 268)
-
Step 400
400
#799BFC
oklch(70.7% 0.147 267.9)
-
Step 500
500
#597FF9
oklch(63.2% 0.187 267.8)
-
Step 600
600
#4264E8
oklch(55.6% 0.203 268.1)
-
Step 700
700 (this color)
#304CC4
oklch(47.3% 0.19 268)
-
Step 800
800
#2B44A3
oklch(42.7% 0.156 267.9)
-
Step 900
900
#263A82
oklch(37.6% 0.124 268.2)
-
Step 950
950
#16234C
oklch(27% 0.078 267.7)
#304CC4 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) | #005FC8 | 0.047 |
| Deuteranopia (no green cones) | #0051C2 | 0.027 |
| Tritanopia (no blue cones) | #006B81 | 0.149 |
| Achromatopsia (no color) | #585858 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304CC4
#304CC4
oklch(47.3% 0.19 268)
- #725800
#725800
oklch(47.4% 0.097 88.7)
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 #304CC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.029
- Majorelle Blue #3F37C9 ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.057
- Blurple #5539CC ΔE 0.059
- Sapphire #2138AB ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.071
- Azul #1D5DEC ΔE 0.072
Use #304CC4 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.