#304BC3
Closest named color: Blue Blue (#2242C7). oklch(47% 0.189 268.2), rgb(48, 75, 195).
Aa
White text reads best on this color (7.19:1).
About this color
#304BC3 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.189 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.027 away. White text reads best on it, at 7.19:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.92:1 |
| White text | 7.19:1 |
Values
| HEX | #304BC3 |
| RGB | rgb(48, 75, 195) |
| HSL | hsl(229, 60%, 48%) |
| OKLCH | oklch(47% 0.189 268.2) |
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 #304BC3 | 7.19:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #304BC3 | 2.92:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #304BC3 text on white | 7.19:1 | AAA | Lc 84.3 | Fine for body text |
| #304BC3 text on black | 2.92:1 | Fails | Lc -17.6 | 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
#7A9BFC
oklch(70.7% 0.147 268.3)
-
Step 500
500
#5A7EF9
oklch(63% 0.188 268.3)
-
Step 600
600
#4264E8
oklch(55.6% 0.203 268.1)
-
Step 700
700 (this color)
#304BC3
oklch(47% 0.189 268.2)
-
Step 800
800
#2C44A3
oklch(42.8% 0.156 268.2)
-
Step 900
900
#273A81
oklch(37.6% 0.122 268.6)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#304BC3 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) | #005EC7 | 0.047 |
| Deuteranopia (no green cones) | #0051C1 | 0.028 |
| Tritanopia (no blue cones) | #006A80 | 0.149 |
| Achromatopsia (no color) | #575757 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304BC3
#304BC3
oklch(47% 0.189 268.2)
- #715700
#715700
oklch(47% 0.096 88.5)
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 #304BC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.027
- Majorelle Blue #3F37C9 ΔE 0.042
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Blurple #5539CC ΔE 0.058
- Warm Blue #4B57DB ΔE 0.060
- Sapphire #2138AB ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.071
- Azul #1D5DEC ΔE 0.075
Use #304BC3 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.