#057BB5
Closest named color: Nice Blue (#107AB0). oklch(55.6% 0.126 240), rgb(5, 123, 181).
Aa
White text reads best on this color (4.65:1).
About this color
#057BB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.126 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.008 away. White text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.50:1 |
| White text | 4.65:1 |
Values
| HEX | #057BB5 |
| RGB | rgb(5, 123, 181) |
| HSL | hsl(200, 95%, 36%) |
| OKLCH | oklch(55.6% 0.126 240) |
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 #057BB5 | 4.65:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #057BB5 | 4.50:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #057BB5 text on white | 4.65:1 | AA | Lc 71.8 | Content text, not long reading |
| #057BB5 text on black | 4.50:1 | AA | Lc -29.9 | 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C7DCEC
oklch(88.4% 0.032 240.7)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#6AA8D4
oklch(70.7% 0.091 240.7)
-
Step 500
500
#3B92C8
oklch(63.1% 0.116 239.7)
-
Step 600
600 (this color)
#057BB5
oklch(55.6% 0.126 240)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#02557E
oklch(42.8% 0.096 239.4)
-
Step 900
900
#124665
oklch(37.7% 0.075 239.9)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#057BB5 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) | #5F7CB8 | 0.064 |
| Deuteranopia (no green cones) | #486EB4 | 0.048 |
| Tritanopia (no blue cones) | #008A90 | 0.083 |
| Achromatopsia (no color) | #747474 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #057BB5
#057BB5
oklch(55.6% 0.126 240)
- #A75E0C
#A75E0C
oklch(55.5% 0.126 60.1)
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 #057BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.008
- Windows Blue #3778BF ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.033
- Muted Blue #3B719F ΔE 0.043
- Steel Blue #4682B4 ΔE 0.043
- Ocean Blue #03719C ΔE 0.045
- Water Blue #0E87CC ΔE 0.045
- Blue NCS #118AB2 ΔE 0.046
Use #057BB5 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.