#64B4E3
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.7% 0.104 236.3), rgb(100, 180, 227).
Aa
Black text reads best on this color (9.17:1).
About this color
#64B4E3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.104 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.053 away. Black text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.17:1 |
| White text | 2.28:1 |
Values
| HEX | #64B4E3 |
| RGB | rgb(100, 180, 227) |
| HSL | hsl(202, 69%, 64%) |
| OKLCH | oklch(73.7% 0.104 236.3) |
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 #64B4E3 | 2.28:1 | Fails | Lc -49.8 | Large or bold text, headings |
| Black text on #64B4E3 | 9.17:1 | AAA | Lc 59.0 | Large or bold text, headings |
| #64B4E3 text on white | 2.28:1 | Fails | Lc 44.9 | Non-text elements, placeholder text |
| #64B4E3 text on black | 9.17:1 | AAA | Lc -57.2 | 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
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C3DDEE
oklch(88.4% 0.036 236.5)
-
Step 300
300
#99C8E6
oklch(81% 0.065 236.6)
-
Step 400
400 (this color)
#64B4E3
oklch(73.7% 0.104 236.3)
-
Step 500
500
#1194CF
oklch(63.1% 0.133 236.5)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557A
oklch(42.5% 0.092 236.4)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#032A3E
oklch(27% 0.056 236.7)
#64B4E3 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) | #9EB3E5 | 0.063 |
| Deuteranopia (no green cones) | #8DA6E2 | 0.053 |
| Tritanopia (no blue cones) | #00C0C4 | 0.079 |
| Achromatopsia (no color) | #ABABAB | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64B4E3
#64B4E3
oklch(73.7% 0.104 236.3)
- #DC9967
#DC9967
oklch(73.8% 0.104 57)
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 #64B4E3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.053
- Vivid Sky Blue #4CC9F0 ΔE 0.055
- Carolina Blue #8AB8FE ΔE 0.058
- Lightblue #7BC8F6 ΔE 0.063
- Turquoise Blue #06B1C4 ΔE 0.069
- Bright Sky Blue #02CCFE ΔE 0.070
- Light Grey Blue #9DBCD4 ΔE 0.071
- Light Cornflower Blue #98C1D9 ΔE 0.071
Use #64B4E3 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.