#0063D1
Closest named color: Azul (#1D5DEC). oklch(51.9% 0.187 257.4), rgb(0, 99, 209).
Aa
White text reads best on this color (5.66:1).
About this color
#0063D1 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.187 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.045 away. White text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.70:1 |
| White text | 5.66:1 |
Values
| HEX | #0063D1 |
| RGB | rgb(0, 99, 209) |
| HSL | hsl(212, 100%, 41%) |
| OKLCH | oklch(51.9% 0.187 257.4) |
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 #0063D1 | 5.66:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #0063D1 | 3.70:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #0063D1 text on white | 5.66:1 | AA | Lc 77.5 | Fine for body text |
| #0063D1 text on black | 3.70:1 | AA large text | Lc -24.3 | 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
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9CC3FB
oklch(80.9% 0.09 257.4)
-
Step 400
400
#63A1F9
oklch(70.6% 0.145 257.3)
-
Step 500
500
#3487F6
oklch(63.1% 0.184 257.1)
-
Step 600
600
#006DE5
oklch(55.6% 0.201 257.4)
-
Step 700
700 (this color)
#0063D1
oklch(51.9% 0.187 257.4)
-
Step 800
800
#004AA1
oklch(42.6% 0.155 257.6)
-
Step 900
900
#0E3F80
oklch(37.7% 0.121 257.5)
-
Step 950
950
#0B264B
oklch(27.1% 0.076 257.3)
#0063D1 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) | #0270D5 | 0.034 |
| Deuteranopia (no green cones) | #005FCF | 0.011 |
| Tritanopia (no blue cones) | #007E90 | 0.140 |
| Achromatopsia (no color) | #676767 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0063D1
#0063D1
oklch(51.9% 0.187 257.4)
- #8B5F00
#8B5F00
oklch(51.9% 0.109 77.2)
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 #0063D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.045
- Royal Blue #4169E1 ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.052
- Mid Blue #276AB3 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.056
- Neon Blue #4361EE ΔE 0.061
- Bright Blue #0165FC ΔE 0.066
- French Blue #436BAD ΔE 0.074
Use #0063D1 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.