#0571CD
Closest named color: Windows Blue (#3778BF). oklch(54.8% 0.165 252.7), rgb(5, 113, 205).
Aa
White text reads best on this color (4.94:1).
About this color
#0571CD is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.165 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.040 away. White text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.25:1 |
| White text | 4.94:1 |
Values
| HEX | #0571CD |
| RGB | rgb(5, 113, 205) |
| HSL | hsl(208, 95%, 41%) |
| OKLCH | oklch(54.8% 0.165 252.7) |
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 #0571CD | 4.94:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #0571CD | 4.25:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #0571CD text on white | 4.94:1 | AA | Lc 73.5 | Content text, not long reading |
| #0571CD text on black | 4.25:1 | AA large text | Lc -28.2 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DBF4
oklch(88.4% 0.041 252.8)
-
Step 300
300
#9FC4F0
oklch(80.9% 0.074 253.1)
-
Step 400
400
#68A4E9
oklch(70.7% 0.12 252.9)
-
Step 500
500
#3B8CE2
oklch(63.2% 0.152 252.6)
-
Step 600
600 (this color)
#0571CD
oklch(54.8% 0.165 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#054F92
oklch(42.7% 0.128 252.9)
-
Step 900
900
#124274
oklch(37.6% 0.099 253)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#0571CD 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) | #3F79D1 | 0.041 |
| Deuteranopia (no green cones) | #0B69CB | 0.021 |
| Tritanopia (no blue cones) | #008795 | 0.121 |
| Achromatopsia (no color) | #707070 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0571CD
#0571CD
oklch(54.8% 0.165 252.7)
- #9A6400
#9A6400
oklch(54.8% 0.117 72.5)
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 #0571CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.040
- Mid Blue #276AB3 ΔE 0.042
- Royal Blue #4169E1 ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.052
- Nice Blue #107AB0 ΔE 0.056
- French Blue #436BAD ΔE 0.057
- Water Blue #0E87CC ΔE 0.062
- Flat Blue #3C73A8 ΔE 0.064
Use #0571CD 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.