#304EC3
Closest named color: Blue Blue (#2242C7). oklch(47.6% 0.186 267.6), rgb(48, 78, 195).
Aa
White text reads best on this color (6.99:1).
About this color
#304EC3 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.186 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.033 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #304EC3 |
| RGB | rgb(48, 78, 195) |
| HSL | hsl(228, 60%, 48%) |
| OKLCH | oklch(47.6% 0.186 267.6) |
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 #304EC3 | 6.99:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #304EC3 | 3.00:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #304EC3 text on white | 6.99:1 | AA | Lc 83.6 | Fine for body text |
| #304EC3 text on black | 3.00:1 | AA large text | Lc -18.3 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FB
oklch(88.6% 0.049 267.7)
-
Step 300
300
#A7BFFC
oklch(80.9% 0.091 267.7)
-
Step 400
400
#799CFA
oklch(70.8% 0.143 267.3)
-
Step 500
500
#597FF7
oklch(63% 0.184 267.7)
-
Step 600
600
#4165E6
oklch(55.6% 0.2 267.6)
-
Step 700
700 (this color)
#304EC3
oklch(47.6% 0.186 267.6)
-
Step 800
800
#2B45A2
oklch(42.8% 0.154 267.6)
-
Step 900
900
#263B80
oklch(37.7% 0.119 267.6)
-
Step 950
950
#16234B
oklch(26.9% 0.076 267.6)
#304EC3 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) | #0060C7 | 0.046 |
| Deuteranopia (no green cones) | #0052C1 | 0.027 |
| Tritanopia (no blue cones) | #006C81 | 0.147 |
| Achromatopsia (no color) | #595959 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304EC3
#304EC3
oklch(47.6% 0.186 267.6)
- #745800
#745800
oklch(47.6% 0.097 87.1)
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 #304EC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.033
- Majorelle Blue #3F37C9 ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.056
- Blurple #5539CC ΔE 0.061
- Sapphire #2138AB ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.071
- Azul #1D5DEC ΔE 0.072
Use #304EC3 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.