#81A3FF
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.9% 0.139 267.5), rgb(129, 163, 255).
Aa
Black text reads best on this color (8.61:1).
About this color
#81A3FF is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.139 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.028 away. Black text reads best on it, at 8.61:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.61:1 |
| White text | 2.43:1 |
Values
| HEX | #81A3FF |
| RGB | rgb(129, 163, 255) |
| HSL | hsl(224, 100%, 75%) |
| OKLCH | oklch(72.9% 0.139 267.5) |
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 #81A3FF | 2.43:1 | Fails | Lc -52.8 | Large or bold text, headings |
| Black text on #81A3FF | 8.61:1 | AAA | Lc 56.2 | Large or bold text, headings |
| #81A3FF text on white | 2.43:1 | Fails | Lc 47.8 | Large or bold text, headings |
| #81A3FF text on black | 8.61:1 | AAA | Lc -54.2 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFFA
oklch(80.9% 0.088 267.9)
-
Step 400
400 (this color)
#81A3FF
oklch(72.9% 0.139 267.5)
-
Step 500
500
#5A80F4
oklch(63.1% 0.178 267.5)
-
Step 600
600
#4266E3
oklch(55.6% 0.194 267.5)
-
Step 700
700
#3554C5
oklch(49.2% 0.18 267.6)
-
Step 800
800
#2C459F
oklch(42.6% 0.149 267.8)
-
Step 900
900
#273B7E
oklch(37.6% 0.116 267.9)
-
Step 950
950
#17234A
oklch(26.9% 0.074 268.3)
#81A3FF 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) | #80ACFF | 0.024 |
| Deuteranopia (no green cones) | #72A1FD | 0.019 |
| Tritanopia (no blue cones) | #4AB7C5 | 0.126 |
| Achromatopsia (no color) | #A6A6A6 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #81A3FF
#81A3FF
oklch(72.9% 0.139 267.5)
- #CCA125
#CCA125
oklch(72.9% 0.139 87.8)
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 #81A3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.028
- Cornflower Blue #6495ED ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.058
- Perrywinkle #8F8CE7 ΔE 0.062
- Lavender Blue #8B88F8 ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.076
- Periwinkle #8E82FE ΔE 0.082
- Soft Blue #6488EA ΔE 0.084
Use #81A3FF 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.