#81A1FF
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.5% 0.142 268.5), rgb(129, 161, 255).
Aa
Black text reads best on this color (8.47:1).
About this color
#81A1FF is a medium-light, vivid blue. In OKLCH its lightness is 73%, its chroma 0.142 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.025 away. Black text reads best on it, at 8.47:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.47:1 |
| White text | 2.47:1 |
Values
| HEX | #81A1FF |
| RGB | rgb(129, 161, 255) |
| HSL | hsl(225, 100%, 75%) |
| OKLCH | oklch(72.5% 0.142 268.5) |
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 #81A1FF | 2.47:1 | Fails | Lc -53.6 | Large or bold text, headings |
| Black text on #81A1FF | 8.47:1 | AAA | Lc 55.4 | Large or bold text, headings |
| #81A1FF text on white | 2.47:1 | Fails | Lc 48.6 | Large or bold text, headings |
| #81A1FF text on black | 8.47:1 | AAA | Lc -53.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CBD9FB
oklch(88.6% 0.049 267.7)
-
Step 300
300
#A9BFFB
oklch(81% 0.089 268.8)
-
Step 400
400 (this color)
#81A1FF
oklch(72.5% 0.142 268.5)
-
Step 500
500
#5C7FF6
oklch(63.1% 0.182 268.5)
-
Step 600
600
#4565E4
oklch(55.6% 0.196 268.5)
-
Step 700
700
#3753C7
oklch(49.2% 0.183 268.4)
-
Step 800
800
#2D44A0
oklch(42.6% 0.152 268.5)
-
Step 900
900
#283B7F
oklch(37.7% 0.117 268.5)
-
Step 950
950
#17234B
oklch(27% 0.076 268.4)
#81A1FF 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) | #7DAAFF | 0.023 |
| Deuteranopia (no green cones) | #6F9FFD | 0.022 |
| Tritanopia (no blue cones) | #4BB5C4 | 0.127 |
| Achromatopsia (no color) | #A5A5A5 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #81A1FF
#81A1FF
oklch(72.5% 0.142 268.5)
- #CBA01D
#CBA01D
oklch(72.6% 0.142 88.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #81A1FF
These curated palettes and gradients contain exactly #81A1FF. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.025
- Cornflower Blue #6495ED ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.062
- Carolina Blue #8AB8FE ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.073
- Periwinkle #8E82FE ΔE 0.077
- Soft Blue #6488EA ΔE 0.080
Use #81A1FF 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.