#0A57CA
Closest named color: Blue Blue (#2242C7). oklch(49% 0.192 260), rgb(10, 87, 202).
Aa
White text reads best on this color (6.50:1).
About this color
#0A57CA is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.192 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.047 away. White text reads best on it, at 6.50:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #0A57CA |
| RGB | rgb(10, 87, 202) |
| HSL | hsl(216, 91%, 42%) |
| OKLCH | oklch(49% 0.192 260) |
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 #0A57CA | 6.50:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #0A57CA | 3.22:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #0A57CA text on white | 6.50:1 | AA | Lc 81.4 | Fine for body text |
| #0A57CA text on black | 3.22:1 | AA large text | Lc -20.5 | 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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9EC2FD
oklch(80.9% 0.093 260.1)
-
Step 400
400
#68A0FC
oklch(70.8% 0.148 259.9)
-
Step 500
500
#3D84FA
oklch(63.1% 0.19 260)
-
Step 600
600
#1A6AE9
oklch(55.6% 0.206 260.1)
-
Step 700
700 (this color)
#0A57CA
oklch(49% 0.192 260)
-
Step 800
800
#0E48A4
oklch(42.7% 0.16 260.1)
-
Step 900
900
#143E82
oklch(37.8% 0.124 259.8)
-
Step 950
950
#0D254C
oklch(27% 0.078 259.7)
#0A57CA 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) | #0066CE | 0.038 |
| Deuteranopia (no green cones) | #0056C8 | 0.005 |
| Tritanopia (no blue cones) | #007488 | 0.144 |
| Achromatopsia (no color) | #5E5E5E | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A57CA
#0A57CA
oklch(49% 0.192 260)
- #7E5900
#7E5900
oklch(49% 0.101 80.5)
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 #0A57CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.047
- Azul #1D5DEC ΔE 0.056
- Warm Blue #4B57DB ΔE 0.059
- Mid Blue #276AB3 ΔE 0.068
- Majorelle Blue #3F37C9 ΔE 0.072
- Royal Blue #4169E1 ΔE 0.073
- Neon Blue #4361EE ΔE 0.077
- Cerulean Blue #056EEE ΔE 0.078
Use #0A57CA 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.