#0571E8
Closest named color: Cerulean Blue (#056EEE). oklch(56.7% 0.199 257), rgb(5, 113, 232).
Aa
White text reads best on this color (4.63:1).
About this color
#0571E8 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.199 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.012 away. White text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.53:1 |
| White text | 4.63:1 |
Values
| HEX | #0571E8 |
| RGB | rgb(5, 113, 232) |
| HSL | hsl(211, 96%, 46%) |
| OKLCH | oklch(56.7% 0.199 257) |
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 #0571E8 | 4.63:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #0571E8 | 4.53:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #0571E8 text on white | 4.63:1 | AA | Lc 71.3 | Content text, not long reading |
| #0571E8 text on black | 4.53:1 | AA | Lc -30.3 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9CC3FA
oklch(80.9% 0.089 257)
-
Step 400
400
#63A2F8
oklch(70.8% 0.143 256.6)
-
Step 500
500
#3487F5
oklch(63.1% 0.183 257)
-
Step 600
600 (this color)
#0571E8
oklch(56.7% 0.199 257)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#0E3F7F
oklch(37.6% 0.12 257.3)
-
Step 950
950
#0A264A
oklch(27% 0.075 256.3)
#0571E8 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) | #177EEC | 0.035 |
| Deuteranopia (no green cones) | #006CE6 | 0.013 |
| Tritanopia (no blue cones) | #008FA2 | 0.150 |
| Achromatopsia (no color) | #757575 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0571E8
#0571E8
oklch(56.7% 0.199 257)
- #9D6C00
#9D6C00
oklch(56.8% 0.119 77.4)
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 #0571E8, closest first.
No curated palette has a color within ΔE 0.04 of #0571E8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.012
- Royal Blue #4169E1 ΔE 0.034
- Clear Blue #247AFD ΔE 0.041
- Bright Blue #0165FC ΔE 0.042
- Neon Blue #4361EE ΔE 0.047
- Azul #1D5DEC ΔE 0.047
- Warm Blue #4B57DB ΔE 0.070
- Windows Blue #3778BF ΔE 0.071
Use #0571E8 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.