#63A1FF
Closest named color: Cornflower Blue (#6495ED). oklch(70.9% 0.153 258.5), rgb(99, 161, 255).
Aa
Black text reads best on this color (8.07:1).
About this color
#63A1FF is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.153 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.037 away. Black text reads best on it, at 8.07:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.07:1 |
| White text | 2.60:1 |
Values
| HEX | #63A1FF |
| RGB | rgb(99, 161, 255) |
| HSL | hsl(216, 100%, 69%) |
| OKLCH | oklch(70.9% 0.153 258.5) |
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 #63A1FF | 2.60:1 | Fails | Lc -55.7 | Large or bold text, headings |
| Black text on #63A1FF | 8.07:1 | AAA | Lc 53.5 | Large or bold text, headings |
| #63A1FF text on white | 2.60:1 | Fails | Lc 50.6 | Large or bold text, headings |
| #63A1FF text on black | 8.07:1 | AAA | Lc -51.4 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFD
oklch(88.5% 0.053 258)
-
Step 300
300
#9BC2FE
oklch(80.8% 0.095 258.8)
-
Step 400
400 (this color)
#63A1FF
oklch(70.9% 0.153 258.5)
-
Step 500
500
#3385FC
oklch(63.1% 0.194 258.4)
-
Step 600
600
#006BEB
oklch(55.7% 0.21 258.5)
-
Step 700
700
#0059C7
oklch(49% 0.186 258.6)
-
Step 800
800
#0049A5
oklch(42.7% 0.162 258.5)
-
Step 900
900
#0D3E83
oklch(37.7% 0.127 258.5)
-
Step 950
950
#0A254D
oklch(27% 0.081 258.5)
#63A1FF 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) | #78A8FF | 0.031 |
| Deuteranopia (no green cones) | #639AFD | 0.018 |
| Tritanopia (no blue cones) | #00B6C4 | 0.127 |
| Achromatopsia (no color) | #A0A0A0 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A1FF
#63A1FF
oklch(70.9% 0.153 258.5)
- #D29400
#D29400
oklch(70.9% 0.147 78.7)
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 #63A1FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.037
- Chefchaouen Blue #4895EF ΔE 0.047
- Periwinkle Blue #8F99FB ΔE 0.051
- Soft Blue #6488EA ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.070
- Dodger Blue #1E90FF ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.071
- Lavender Blue #8B88F8 ΔE 0.072
Use #63A1FF 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.