#304EC0
Closest named color: Blue Blue (#2242C7). oklch(47.3% 0.182 267.5), rgb(48, 78, 192).
Aa
White text reads best on this color (7.05:1).
About this color
#304EC0 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.182 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.034 away. White text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #304EC0 |
| RGB | rgb(48, 78, 192) |
| HSL | hsl(228, 60%, 47%) |
| OKLCH | oklch(47.3% 0.182 267.5) |
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 #304EC0 | 7.05:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #304EC0 | 2.97:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #304EC0 text on white | 7.05:1 | AAA | Lc 83.9 | Fine for body text |
| #304EC0 text on black | 2.97:1 | Fails | Lc -18.1 | 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
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFFA
oklch(80.9% 0.088 267.9)
-
Step 400
400
#7A9CF8
oklch(70.7% 0.14 267.4)
-
Step 500
500
#5A80F5
oklch(63.1% 0.18 267.5)
-
Step 600
600
#4266E4
oklch(55.7% 0.196 267.5)
-
Step 700
700 (this color)
#304EC0
oklch(47.3% 0.182 267.5)
-
Step 800
800
#2B45A0
oklch(42.7% 0.151 267.5)
-
Step 900
900
#263B7F
oklch(37.6% 0.118 267.5)
-
Step 950
950
#16234A
oklch(26.9% 0.074 267.4)
#304EC0 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) | #005FC4 | 0.044 |
| Deuteranopia (no green cones) | #0052BE | 0.027 |
| Tritanopia (no blue cones) | #006B7F | 0.145 |
| Achromatopsia (no color) | #595959 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304EC0
#304EC0
oklch(47.3% 0.182 267.5)
- #735700
#735700
oklch(47.3% 0.097 86.9)
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 #304EC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.034
- Majorelle Blue #3F37C9 ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.059
- Blurple #5539CC ΔE 0.063
- Sapphire #2138AB ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.072
- Iris #6258C4 ΔE 0.074
Use #304EC0 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.