#64A8EF
Closest named color: Cornflower Blue (#6495ED). oklch(71.6% 0.125 250.9), rgb(100, 168, 239).
Aa
Black text reads best on this color (8.38:1).
About this color
#64A8EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.125 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.051 away. Black text reads best on it, at 8.38:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.38:1 |
| White text | 2.50:1 |
Values
| HEX | #64A8EF |
| RGB | rgb(100, 168, 239) |
| HSL | hsl(211, 81%, 66%) |
| OKLCH | oklch(71.6% 0.125 250.9) |
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 #64A8EF | 2.50:1 | Fails | Lc -54.0 | Large or bold text, headings |
| Black text on #64A8EF | 8.38:1 | AAA | Lc 55.1 | Large or bold text, headings |
| #64A8EF text on white | 2.50:1 | Fails | Lc 48.9 | Large or bold text, headings |
| #64A8EF text on black | 8.38:1 | AAA | Lc -53.0 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9BC5F2
oklch(80.9% 0.078 250.5)
-
Step 400
400 (this color)
#64A8EF
oklch(71.6% 0.125 250.9)
-
Step 500
500
#2C8CE6
oklch(63% 0.161 251.1)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#064376
oklch(37.7% 0.104 250.5)
-
Step 950
950
#082745
oklch(26.8% 0.066 251.2)
#64A8EF 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) | #8AABF2 | 0.043 |
| Deuteranopia (no green cones) | #789EEE | 0.031 |
| Tritanopia (no blue cones) | #00B8C1 | 0.104 |
| Achromatopsia (no color) | #A4A4A4 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64A8EF
#64A8EF
oklch(71.6% 0.125 250.9)
- #D49540
#D49540
oklch(71.6% 0.125 71.3)
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 #64A8EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.051
- Chefchaouen Blue #4895EF ΔE 0.061
- Carolina Blue #8AB8FE ΔE 0.064
- Periwinkle Blue #8F99FB ΔE 0.064
- Deep Sky Blue #00BFFF ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.080
- Perrywinkle #8F8CE7 ΔE 0.081
- Greyblue #77A1B5 ΔE 0.084
Use #64A8EF 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.