#2271F3
Closest named color: Cerulean Blue (#056EEE). oklch(57.9% 0.21 260.3), rgb(34, 113, 243).
Aa
Black text reads best on this color (4.72:1).
About this color
#2271F3 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.210 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.016 away. Black text reads best on it, at 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #2271F3 |
| RGB | rgb(34, 113, 243) |
| HSL | hsl(217, 90%, 54%) |
| OKLCH | oklch(57.9% 0.21 260.3) |
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 #2271F3 | 4.44:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #2271F3 | 4.72:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #2271F3 text on white | 4.44:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #2271F3 text on black | 4.72:1 | AA | Lc -31.5 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9DC2FE
oklch(80.9% 0.094 259.9)
-
Step 400
400
#679FFE
oklch(70.6% 0.152 260.4)
-
Step 500
500
#3D84FC
oklch(63.2% 0.193 260.3)
-
Step 600
600 (this color)
#2271F3
oklch(57.9% 0.21 260.3)
-
Step 700
700
#0A57CC
oklch(49.1% 0.194 260.2)
-
Step 800
800
#0E48A5
oklch(42.7% 0.161 260.2)
-
Step 900
900
#143D83
oklch(37.6% 0.127 260.5)
-
Step 950
950
#0D254D
oklch(27.1% 0.08 260.1)
#2271F3 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) | #0081F8 | 0.039 |
| Deuteranopia (no green cones) | #006FF0 | 0.013 |
| Tritanopia (no blue cones) | #0091A7 | 0.159 |
| Achromatopsia (no color) | #787878 | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2271F3
#2271F3
oklch(57.9% 0.21 260.3)
- #9F7100
#9F7100
oklch(58% 0.12 80.3)
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 #2271F3, closest first.
No curated palette has a color within ΔE 0.04 of #2271F3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.016
- Clear Blue #247AFD ΔE 0.026
- Bright Blue #0165FC ΔE 0.035
- Royal Blue #4169E1 ΔE 0.036
- Neon Blue #4361EE ΔE 0.040
- Azul #1D5DEC ΔE 0.049
- Warm Blue #4B57DB ΔE 0.071
- Cornflower #6A79F7 ΔE 0.073
Use #2271F3 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.