#0057CF
Closest named color: Blue Blue (#2242C7). oklch(49.3% 0.199 259.8), rgb(0, 87, 207).
Aa
White text reads best on this color (6.43:1).
About this color
#0057CF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.199 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.048 away. White text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #0057CF |
| RGB | rgb(0, 87, 207) |
| HSL | hsl(215, 100%, 41%) |
| OKLCH | oklch(49.3% 0.199 259.8) |
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 #0057CF | 6.43:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #0057CF | 3.26:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #0057CF text on white | 6.43:1 | AA | Lc 81.0 | Fine for body text |
| #0057CF text on black | 3.26:1 | AA large text | Lc -20.9 | 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 700.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#659FFF
oklch(70.6% 0.154 260)
-
Step 500
500
#3984FE
oklch(63.2% 0.197 259.8)
-
Step 600
600
#1069ED
oklch(55.6% 0.214 259.8)
-
Step 700
700 (this color)
#0057CF
oklch(49.3% 0.199 259.8)
-
Step 800
800
#0748A7
oklch(42.8% 0.165 259.7)
-
Step 900
900
#113D84
oklch(37.6% 0.129 259.9)
-
Step 950
950
#0C254D
oklch(27.1% 0.08 259.5)
#0057CF 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) | #0067D3 | 0.041 |
| Deuteranopia (no green cones) | #0056CD | 0.004 |
| Tritanopia (no blue cones) | #00768A | 0.151 |
| Achromatopsia (no color) | #5F5F5F | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0057CF
#0057CF
oklch(49.3% 0.199 259.8)
- #7F5900
#7F5900
oklch(49.2% 0.102 79.8)
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 #0057CF, closest first.
No curated palette has a color within ΔE 0.04 of #0057CF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.048
- Azul #1D5DEC ΔE 0.050
- Warm Blue #4B57DB ΔE 0.058
- Royal Blue #4169E1 ΔE 0.071
- Majorelle Blue #3F37C9 ΔE 0.073
- Neon Blue #4361EE ΔE 0.073
- Mid Blue #276AB3 ΔE 0.073
- Cerulean Blue #056EEE ΔE 0.074
Use #0057CF 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.