#818FFB
Closest named color: Lavender Blue (#8B88F8). oklch(68.8% 0.159 275.8), rgb(129, 143, 251).
Aa
Black text reads best on this color (7.25:1).
About this color
#818FFB is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.159 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Lavender Blue (#8B88F8), ΔE 0.020 away. Black text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Lavender Blue (#8B88F8) |
| Black text | 7.25:1 |
| White text | 2.89:1 |
Values
| HEX | #818FFB |
| RGB | rgb(129, 143, 251) |
| HSL | hsl(233, 94%, 75%) |
| OKLCH | oklch(68.8% 0.159 275.8) |
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 #818FFB | 2.89:1 | Fails | Lc -60.4 | Content text, not long reading |
| Black text on #818FFB | 7.25:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #818FFB text on white | 2.89:1 | Fails | Lc 55.1 | Large or bold text, headings |
| #818FFB text on black | 7.25:1 | AAA | Lc -46.7 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD7FE
oklch(88.6% 0.054 276.1)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400 (this color)
#818FFB
oklch(68.8% 0.159 275.8)
-
Step 500
500
#6C77FF
oklch(63.2% 0.199 275.6)
-
Step 600
600
#575AF0
oklch(55.6% 0.22 275.7)
-
Step 700
700
#4848D1
oklch(49.1% 0.205 275.8)
-
Step 800
800
#3B3CA9
oklch(42.7% 0.17 276)
-
Step 900
900
#313586
oklch(37.6% 0.133 275.8)
-
Step 950
950
#1C204E
oklch(26.9% 0.084 275.5)
#818FFB 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) | #639DFF | 0.045 |
| Deuteranopia (no green cones) | #5893F9 | 0.046 |
| Tritanopia (no blue cones) | #51A6B9 | 0.140 |
| Achromatopsia (no color) | #989898 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FFB
#818FFB
oklch(68.8% 0.159 275.8)
- #B59900
#B59900
oklch(68.8% 0.141 95.9)
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 #818FFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lavender Blue #8B88F8 ΔE 0.020
- Periwinkle Blue #8F99FB ΔE 0.033
- Perrywinkle #8F8CE7 ΔE 0.034
- Periwinkle #8E82FE ΔE 0.035
- Cornflower Blue #6495ED ΔE 0.043
- Soft Blue #6488EA ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.064
- Cornflower #6A79F7 ΔE 0.066
Use #818FFB 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.