#63A4DE
Closest named color: Cornflower Blue (#6495ED). oklch(69.9% 0.109 247), rgb(99, 164, 222).
Aa
Black text reads best on this color (7.89:1).
About this color
#63A4DE is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.109 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.051 away. Black text reads best on it, at 7.89:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.89:1 |
| White text | 2.65:1 |
Values
| HEX | #63A4DE |
| RGB | rgb(99, 164, 222) |
| HSL | hsl(208, 65%, 63%) |
| OKLCH | oklch(69.9% 0.109 247) |
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 #63A4DE | 2.65:1 | Fails | Lc -56.8 | Large or bold text, headings |
| Black text on #63A4DE | 7.89:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #63A4DE text on white | 2.65:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #63A4DE text on black | 7.89:1 | AAA | Lc -50.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9EC5EB
oklch(80.8% 0.068 248)
-
Step 400
400 (this color)
#63A4DE
oklch(69.9% 0.109 247)
-
Step 500
500
#348FD8
oklch(63.1% 0.139 246.9)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#0D446F
oklch(37.6% 0.091 247.7)
-
Step 950
950
#0B2841
oklch(26.9% 0.058 248)
#63A4DE 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) | #8BA5E1 | 0.045 |
| Deuteranopia (no green cones) | #7B99DD | 0.036 |
| Tritanopia (no blue cones) | #00B2B8 | 0.093 |
| Achromatopsia (no color) | #9F9F9F | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A4DE
#63A4DE
oklch(69.9% 0.109 247)
- #CB904F
#CB904F
oklch(69.8% 0.109 67)
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 #63A4DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.060
- Greyblue #77A1B5 ΔE 0.061
- Bluegrey #85A3B2 ΔE 0.072
- Dark Sky Blue #448EE4 ΔE 0.073
- Faded Blue #658CBB ΔE 0.074
- Bluey Grey #89A0B0 ΔE 0.075
- Turquoise Blue #06B1C4 ΔE 0.076
Use #63A4DE 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.