#64B1EA
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.4% 0.113 242.5), rgb(100, 177, 234).
Aa
Black text reads best on this color (9.01:1).
About this color
#64B1EA is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.113 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.052 away. Black text reads best on it, at 9.01:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.01:1 |
| White text | 2.32:1 |
Values
| HEX | #64B1EA |
| RGB | rgb(100, 177, 234) |
| HSL | hsl(206, 76%, 65%) |
| OKLCH | oklch(73.4% 0.113 242.5) |
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 #64B1EA | 2.32:1 | Fails | Lc -50.6 | Large or bold text, headings |
| Black text on #64B1EA | 9.01:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #64B1EA text on white | 2.32:1 | Fails | Lc 45.7 | Large or bold text, headings |
| #64B1EA text on black | 9.01:1 | AAA | Lc -56.3 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C4DDF1
oklch(88.5% 0.038 242.2)
-
Step 300
300
#99C7EB
oklch(81% 0.07 242.3)
-
Step 400
400 (this color)
#64B1EA
oklch(73.4% 0.113 242.5)
-
Step 500
500
#1991D9
oklch(63.1% 0.145 242.8)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950
#042941
oklch(27% 0.06 242.6)
#64B1EA 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) | #98B1ED | 0.057 |
| Deuteranopia (no green cones) | #86A4E9 | 0.046 |
| Tritanopia (no blue cones) | #00BFC4 | 0.090 |
| Achromatopsia (no color) | #AAAAAA | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64B1EA
#64B1EA
oklch(73.4% 0.113 242.5)
- #DB985A
#DB985A
oklch(73.3% 0.113 62.4)
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 #64B1EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.052
- Carolina Blue #8AB8FE ΔE 0.054
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Lightblue #7BC8F6 ΔE 0.068
- Bright Sky Blue #02CCFE ΔE 0.075
- Sky #82CAFC ΔE 0.078
- Cornflower Blue #6495ED ΔE 0.078
- Turquoise Blue #06B1C4 ΔE 0.078
Use #64B1EA 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.