#64A1BF
Closest named color: Greyblue (#77A1B5). oklch(67.9% 0.077 230.8), rgb(100, 161, 191).
Aa
Black text reads best on this color (7.39:1).
About this color
#64A1BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.077 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.024 away. Black text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.39:1 |
| White text | 2.84:1 |
Values
| HEX | #64A1BF |
| RGB | rgb(100, 161, 191) |
| HSL | hsl(200, 42%, 57%) |
| OKLCH | oklch(67.9% 0.077 230.8) |
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 #64A1BF | 2.84:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #64A1BF | 7.39:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #64A1BF text on white | 2.84:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #64A1BF text on black | 7.39:1 | AAA | Lc -47.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DA
oklch(80.9% 0.048 230.4)
-
Step 400
400 (this color)
#64A1BF
oklch(67.9% 0.077 230.8)
-
Step 500
500
#4094BA
oklch(63.1% 0.099 230.8)
-
Step 600
600
#137EA6
oklch(55.7% 0.107 230.4)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#095674
oklch(42.6% 0.083 231.7)
-
Step 900
900
#15475D
oklch(37.6% 0.064 231.2)
-
Step 950
950
#0E2A37
oklch(27% 0.041 231.2)
#64A1BF 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) | #929FC1 | 0.054 |
| Deuteranopia (no green cones) | #8595BF | 0.048 |
| Tritanopia (no blue cones) | #38A9AB | 0.056 |
| Achromatopsia (no color) | #999999 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64A1BF
#64A1BF
oklch(67.9% 0.077 230.8)
- #BF8A6C
#BF8A6C
oklch(67.8% 0.078 50.5)
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 #64A1BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.042
- Bluey Grey #89A0B0 ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.047
- Cool Gray #8D99AE ΔE 0.051
- Silver Lake Blue #778DA9 ΔE 0.057
- Faded Blue #658CBB ΔE 0.059
- Turquoise Blue #06B1C4 ΔE 0.059
Use #64A1BF 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.