#0571B1
Closest named color: Mid Blue (#276AB3). oklch(52.9% 0.13 244.6), rgb(5, 113, 177).
Aa
White text reads best on this color (5.24:1).
About this color
#0571B1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.130 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.023 away. White text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #0571B1 |
| RGB | rgb(5, 113, 177) |
| HSL | hsl(202, 95%, 36%) |
| OKLCH | oklch(52.9% 0.13 244.6) |
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 #0571B1 | 5.24:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #0571B1 | 4.00:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #0571B1 text on white | 5.24:1 | AA | Lc 75.4 | Fine for body text |
| #0571B1 text on black | 4.00:1 | AA large text | Lc -26.3 | 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 600.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A1C5E5
oklch(80.8% 0.06 245.5)
-
Step 400
400
#6CA7D7
oklch(70.7% 0.094 244.2)
-
Step 500
500
#4190CD
oklch(63.1% 0.12 244.8)
-
Step 600
600 (this color)
#0571B1
oklch(52.9% 0.13 244.6)
-
Step 700
700
#0366A0
oklch(49.2% 0.121 244.3)
-
Step 800
800
#0C5382
oklch(42.7% 0.101 244.8)
-
Step 900
900
#164568
oklch(37.7% 0.078 244.8)
-
Step 950
950
#0E293D
oklch(27.1% 0.05 243.6)
#0571B1 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) | #5274B4 | 0.054 |
| Deuteranopia (no green cones) | #3A66B0 | 0.037 |
| Tritanopia (no blue cones) | #008188 | 0.091 |
| Achromatopsia (no color) | #6C6C6C | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0571B1
#0571B1
oklch(52.9% 0.13 244.6)
- #9A5A00
#9A5A00
oklch(52.9% 0.119 64.3)
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 #0571B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.023
- Nice Blue #107AB0 ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.033
- Ocean Blue #03719C ΔE 0.034
- French Blue #436BAD ΔE 0.037
- Muted Blue #3B719F ΔE 0.038
- Windows Blue #3778BF ΔE 0.040
- Sea Blue #047495 ΔE 0.048
Use #0571B1 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.