#64B1DF
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.9% 0.102 236.7), rgb(100, 177, 223).
Aa
Black text reads best on this color (8.89:1).
About this color
#64B1DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.102 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.059 away. Black text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.89:1 |
| White text | 2.36:1 |
Values
| HEX | #64B1DF |
| RGB | rgb(100, 177, 223) |
| HSL | hsl(202, 66%, 63%) |
| OKLCH | oklch(72.9% 0.102 236.7) |
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 #64B1DF | 2.36:1 | Fails | Lc -51.3 | Large or bold text, headings |
| Black text on #64B1DF | 8.89:1 | AAA | Lc 57.6 | Large or bold text, headings |
| #64B1DF text on white | 2.36:1 | Fails | Lc 46.4 | Large or bold text, headings |
| #64B1DF text on black | 8.89:1 | AAA | Lc -55.7 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEE
oklch(88.4% 0.036 237.6)
-
Step 300
300
#9AC8E5
oklch(81% 0.063 236.3)
-
Step 400
400 (this color)
#64B1DF
oklch(72.9% 0.102 236.7)
-
Step 500
500
#1C94CD
oklch(63.2% 0.129 236.3)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#052A3D
oklch(27% 0.053 236.3)
#64B1DF 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) | #9CB0E1 | 0.062 |
| Deuteranopia (no green cones) | #8BA3DE | 0.052 |
| Tritanopia (no blue cones) | #00BDC0 | 0.079 |
| Achromatopsia (no color) | #A9A9A9 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64B1DF
#64B1DF
oklch(72.9% 0.102 236.7)
- #D89766
#D89766
oklch(72.9% 0.102 57.3)
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 #64B1DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.059
- Vivid Sky Blue #4CC9F0 ΔE 0.063
- Carolina Blue #8AB8FE ΔE 0.064
- Greyblue #77A1B5 ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.065
- Bluegrey #85A3B2 ΔE 0.069
- Lightblue #7BC8F6 ΔE 0.071
- Light Grey Blue #9DBCD4 ΔE 0.074
Use #64B1DF 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.