#63A7DF
Closest named color: Cornflower Blue (#6495ED). oklch(70.6% 0.108 245), rgb(99, 167, 223).
Aa
Black text reads best on this color (8.12:1).
About this color
#63A7DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.108 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.058 away. Black text reads best on it, at 8.12:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.12:1 |
| White text | 2.58:1 |
Values
| HEX | #63A7DF |
| RGB | rgb(99, 167, 223) |
| HSL | hsl(207, 66%, 63%) |
| OKLCH | oklch(70.6% 0.108 245) |
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 #63A7DF | 2.58:1 | Fails | Lc -55.5 | Large or bold text, headings |
| Black text on #63A7DF | 8.12:1 | AAA | Lc 53.6 | Large or bold text, headings |
| #63A7DF text on white | 2.58:1 | Fails | Lc 50.4 | Large or bold text, headings |
| #63A7DF text on black | 8.12:1 | AAA | Lc -51.6 | 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
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C5DCF1
oklch(88.4% 0.038 245.8)
-
Step 300
300
#9DC6EA
oklch(81% 0.067 245.3)
-
Step 400
400 (this color)
#63A7DF
oklch(70.6% 0.108 245)
-
Step 500
500
#2F90D6
oklch(63.1% 0.137 244.8)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#08456E
oklch(37.7% 0.09 245.2)
-
Step 950
950
#092940
oklch(27.1% 0.056 244.1)
#63A7DF 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) | #8FA8E2 | 0.050 |
| Deuteranopia (no green cones) | #7E9BDE | 0.040 |
| Tritanopia (no blue cones) | #00B4BA | 0.089 |
| Achromatopsia (no color) | #A1A1A1 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A7DF
#63A7DF
oklch(70.6% 0.108 245)
- #CE9254
#CE9254
oklch(70.6% 0.107 65.5)
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 #63A7DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.058
- Greyblue #77A1B5 ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.066
- Bluegrey #85A3B2 ΔE 0.071
- Turquoise Blue #06B1C4 ΔE 0.073
- Deep Sky Blue #00BFFF ΔE 0.074
- Bluey Grey #89A0B0 ΔE 0.074
- Carolina Blue #8AB8FE ΔE 0.076
Use #63A7DF 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.