#64B1D8
Closest named color: Greyblue (#77A1B5). oklch(72.6% 0.095 232.2), rgb(100, 177, 216).
Aa
Black text reads best on this color (8.82:1).
About this color
#64B1D8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.095 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.057 away. Black text reads best on it, at 8.82:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.82:1 |
| White text | 2.38:1 |
Values
| HEX | #64B1D8 |
| RGB | rgb(100, 177, 216) |
| HSL | hsl(200, 60%, 62%) |
| OKLCH | oklch(72.6% 0.095 232.2) |
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 #64B1D8 | 2.38:1 | Fails | Lc -51.7 | Large or bold text, headings |
| Black text on #64B1D8 | 8.82:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #64B1D8 text on white | 2.38:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #64B1D8 text on black | 8.82:1 | AAA | Lc -55.3 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C4DEEC
oklch(88.6% 0.034 231.2)
-
Step 300
300
#9AC8E1
oklch(80.9% 0.06 232.2)
-
Step 400
400 (this color)
#64B1D8
oklch(72.6% 0.095 232.2)
-
Step 500
500
#1E95C6
oklch(63.1% 0.122 232.2)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A90
oklch(49.2% 0.1 232)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#052A3B
oklch(26.9% 0.051 233.3)
#64B1D8 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) | #9EAFDA | 0.064 |
| Deuteranopia (no green cones) | #8EA3D7 | 0.055 |
| Tritanopia (no blue cones) | #0BBCBE | 0.072 |
| Achromatopsia (no color) | #A8A8A8 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64B1D8
#64B1D8
oklch(72.6% 0.095 232.2)
- #D6956E
#D6956E
oklch(72.5% 0.095 51.7)
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 #64B1D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.057
- Turquoise Blue #06B1C4 ΔE 0.058
- Bluegrey #85A3B2 ΔE 0.062
- Vivid Sky Blue #4CC9F0 ΔE 0.065
- Deep Sky Blue #00BFFF ΔE 0.065
- Bluey Grey #89A0B0 ΔE 0.069
- Cool Steel #97A7B3 ΔE 0.071
- Carolina Blue #8AB8FE ΔE 0.072
Use #64B1D8 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.