#0063DF
Closest named color: Azul (#1D5DEC). oklch(53.1% 0.205 258.9), rgb(0, 99, 223).
Aa
White text reads best on this color (5.45:1).
About this color
#0063DF is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.205 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.025 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.85:1 |
| White text | 5.45:1 |
Values
| HEX | #0063DF |
| RGB | rgb(0, 99, 223) |
| HSL | hsl(213, 100%, 44%) |
| OKLCH | oklch(53.1% 0.205 258.9) |
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 #0063DF | 5.45:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #0063DF | 3.85:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #0063DF text on white | 5.45:1 | AA | Lc 76.3 | Fine for body text |
| #0063DF text on black | 3.85:1 | AA large text | Lc -25.5 | 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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FC
oklch(80.8% 0.092 259.2)
-
Step 400
400
#66A0FB
oklch(70.6% 0.147 259.1)
-
Step 500
500
#3985F9
oklch(63.1% 0.189 258.9)
-
Step 600
600 (this color)
#0063DF
oklch(53.1% 0.205 258.9)
-
Step 700
700
#0059C9
oklch(49.2% 0.189 258.8)
-
Step 800
800
#0749A3
oklch(42.7% 0.158 258.9)
-
Step 900
900
#123E81
oklch(37.6% 0.123 259.1)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#0063DF 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) | #0073E3 | 0.041 |
| Deuteranopia (no green cones) | #0061DD | 0.006 |
| Tritanopia (no blue cones) | #008297 | 0.154 |
| Achromatopsia (no color) | #696969 | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0063DF
#0063DF
oklch(53.1% 0.205 258.9)
- #8E6300
#8E6300
oklch(53.1% 0.11 78.9)
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 #0063DF, closest first.
No curated palette has a color within ΔE 0.04 of #0063DF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.025
- Cerulean Blue #056EEE ΔE 0.035
- Royal Blue #4169E1 ΔE 0.042
- Bright Blue #0165FC ΔE 0.045
- Neon Blue #4361EE ΔE 0.046
- Warm Blue #4B57DB ΔE 0.051
- Electric Blue #0652FF ΔE 0.060
- Mid Blue #276AB3 ΔE 0.074
Use #0063DF 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.