#81A8FF
Closest named color: Periwinkle Blue (#8F99FB). oklch(73.9% 0.134 265), rgb(129, 168, 255).
Aa
Black text reads best on this color (8.97:1).
About this color
#81A8FF is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.134 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.039 away. Black text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.97:1 |
| White text | 2.33:1 |
Values
| HEX | #81A8FF |
| RGB | rgb(129, 168, 255) |
| HSL | hsl(221, 100%, 75%) |
| OKLCH | oklch(73.9% 0.134 265) |
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 #81A8FF | 2.33:1 | Fails | Lc -50.9 | Large or bold text, headings |
| Black text on #81A8FF | 8.97:1 | AAA | Lc 58.0 | Large or bold text, headings |
| #81A8FF text on white | 2.33:1 | Fails | Lc 46.0 | Large or bold text, headings |
| #81A8FF text on black | 8.97:1 | AAA | Lc -56.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A6C0F7
oklch(80.8% 0.083 264.9)
-
Step 400
400 (this color)
#81A8FF
oklch(73.9% 0.134 265)
-
Step 500
500
#5683F0
oklch(63.2% 0.171 265)
-
Step 600
600
#3C69DE
oklch(55.5% 0.186 265)
-
Step 700
700
#2F57C1
oklch(49.2% 0.172 265)
-
Step 800
800
#27489C
oklch(42.8% 0.143 264.8)
-
Step 900
900
#243D7C
oklch(37.7% 0.111 265.2)
-
Step 950
950
#152449
oklch(27% 0.072 265.3)
#81A8FF 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) | #87B0FF | 0.023 |
| Deuteranopia (no green cones) | #79A4FD | 0.015 |
| Tritanopia (no blue cones) | #49BBC8 | 0.120 |
| Achromatopsia (no color) | #A9A9A9 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #81A8FF
#81A8FF
oklch(73.9% 0.134 265)
- #D1A335
#D1A335
oklch(73.9% 0.133 85)
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 #81A8FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.039
- Carolina Blue #8AB8FE ΔE 0.045
- Cornflower Blue #6495ED ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.073
- Pastel Blue #A2BFFE ΔE 0.077
- Lavender Blue #8B88F8 ΔE 0.080
- Chefchaouen Blue #4895EF ΔE 0.083
- Deep Sky Blue #00BFFF ΔE 0.086
Use #81A8FF 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.