#64ADD5
Closest named color: Greyblue (#77A1B5). oklch(71.6% 0.094 234.1), rgb(100, 173, 213).
Aa
Black text reads best on this color (8.48:1).
About this color
#64ADD5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.094 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.050 away. Black text reads best on it, at 8.48:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.48:1 |
| White text | 2.47:1 |
Values
| HEX | #64ADD5 |
| RGB | rgb(100, 173, 213) |
| HSL | hsl(201, 57%, 61%) |
| OKLCH | oklch(71.6% 0.094 234.1) |
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 #64ADD5 | 2.47:1 | Fails | Lc -53.6 | Large or bold text, headings |
| Black text on #64ADD5 | 8.48:1 | AAA | Lc 55.5 | Large or bold text, headings |
| #64ADD5 text on white | 2.47:1 | Fails | Lc 48.5 | Large or bold text, headings |
| #64ADD5 text on black | 8.48:1 | AAA | Lc -53.5 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C5DDEC
oklch(88.4% 0.033 235.2)
-
Step 300
300
#9CC8E1
oklch(81% 0.058 233.3)
-
Step 400
400 (this color)
#64ADD5
oklch(71.6% 0.094 234.1)
-
Step 500
500
#2894C6
oklch(63% 0.119 234)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#024864
oklch(37.8% 0.077 233.1)
-
Step 950
950
#072A3B
oklch(27% 0.05 234.4)
#64ADD5 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) | #9AABD7 | 0.061 |
| Deuteranopia (no green cones) | #8A9FD4 | 0.053 |
| Tritanopia (no blue cones) | #18B8BA | 0.073 |
| Achromatopsia (no color) | #A5A5A5 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64ADD5
#64ADD5
oklch(71.6% 0.094 234.1)
- #D1936A
#D1936A
oklch(71.5% 0.093 54.1)
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 #64ADD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.057
- Turquoise Blue #06B1C4 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.063
- Cool Steel #97A7B3 ΔE 0.069
- Deep Sky Blue #00BFFF ΔE 0.072
- Cool Gray #8D99AE ΔE 0.074
- Vivid Sky Blue #4CC9F0 ΔE 0.076
Use #64ADD5 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.