#0063E9
Closest named color: Azul (#1D5DEC). oklch(53.9% 0.217 259.8), rgb(0, 99, 233).
Aa
White text reads best on this color (5.30:1).
About this color
#0063E9 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.217 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.015 away. White text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.217) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.96:1 |
| White text | 5.30:1 |
Values
| HEX | #0063E9 |
| RGB | rgb(0, 99, 233) |
| HSL | hsl(215, 100%, 46%) |
| OKLCH | oklch(53.9% 0.217 259.8) |
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 #0063E9 | 5.30:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #0063E9 | 3.96:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #0063E9 text on white | 5.30:1 | AA | Lc 75.4 | Fine for body text |
| #0063E9 text on black | 3.96:1 | AA large text | Lc -26.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFE
oklch(88.6% 0.054 258.7)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#659FFF
oklch(70.6% 0.154 260)
-
Step 500
500
#3783FF
oklch(63% 0.199 259.9)
-
Step 600
600 (this color)
#0063E9
oklch(53.9% 0.217 259.8)
-
Step 700
700
#0057CE
oklch(49.2% 0.198 259.7)
-
Step 800
800
#0547A8
oklch(42.7% 0.167 259.9)
-
Step 900
900
#103D85
oklch(37.7% 0.13 259.9)
-
Step 950
950
#0B254E
oklch(27.1% 0.082 259.4)
#0063E9 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) | #0075EE | 0.045 |
| Deuteranopia (no green cones) | #0062E6 | 0.005 |
| Tritanopia (no blue cones) | #00859C | 0.164 |
| Achromatopsia (no color) | #6B6B6B | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0063E9
#0063E9
oklch(53.9% 0.217 259.8)
- #906600
#906600
oklch(54% 0.112 80.3)
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 #0063E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.015
- Cerulean Blue #056EEE ΔE 0.028
- Bright Blue #0165FC ΔE 0.029
- Neon Blue #4361EE ΔE 0.039
- Royal Blue #4169E1 ΔE 0.043
- Electric Blue #0652FF ΔE 0.048
- Warm Blue #4B57DB ΔE 0.054
- Clear Blue #247AFD ΔE 0.067
Use #0063E9 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.