#81A4FF
Closest named color: Periwinkle Blue (#8F99FB). oklch(73.1% 0.138 267), rgb(129, 164, 255).
Aa
Black text reads best on this color (8.68:1).
About this color
#81A4FF is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.138 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.030 away. Black text reads best on it, at 8.68:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.68:1 |
| White text | 2.41:1 |
Values
| HEX | #81A4FF |
| RGB | rgb(129, 164, 255) |
| HSL | hsl(223, 100%, 75%) |
| OKLCH | oklch(73.1% 0.138 267) |
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 #81A4FF | 2.41:1 | Fails | Lc -52.5 | Large or bold text, headings |
| Black text on #81A4FF | 8.68:1 | AAA | Lc 56.5 | Large or bold text, headings |
| #81A4FF text on white | 2.41:1 | Fails | Lc 47.5 | Large or bold text, headings |
| #81A4FF text on black | 8.68:1 | AAA | Lc -54.6 | 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
#A8C0F9
oklch(81% 0.085 266.8)
-
Step 400
400 (this color)
#81A4FF
oklch(73.1% 0.138 267)
-
Step 500
500
#5981F3
oklch(63.2% 0.176 266.8)
-
Step 600
600
#4167E2
oklch(55.7% 0.192 267)
-
Step 700
700
#3454C4
oklch(49% 0.179 267.3)
-
Step 800
800
#2B469F
oklch(42.8% 0.148 267.1)
-
Step 900
900
#263C7E
oklch(37.7% 0.115 266.9)
-
Step 950
950
#16244A
oklch(27.1% 0.073 266.4)
#81A4FF 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) | #81ADFF | 0.024 |
| Deuteranopia (no green cones) | #73A1FD | 0.019 |
| Tritanopia (no blue cones) | #4AB7C6 | 0.123 |
| Achromatopsia (no color) | #A7A7A7 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #81A4FF
#81A4FF
oklch(73.1% 0.138 267)
- #CDA128
#CDA128
oklch(73% 0.138 87)
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 #81A4FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.030
- Carolina Blue #8AB8FE ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.058
- Perrywinkle #8F8CE7 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.069
- Chefchaouen Blue #4895EF ΔE 0.077
- Periwinkle #8E82FE ΔE 0.085
- Soft Blue #6488EA ΔE 0.086
Use #81A4FF 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.