#818DFB
Closest named color: Lavender Blue (#8B88F8). oklch(68.4% 0.161 276.6), rgb(129, 141, 251).
Aa
Black text reads best on this color (7.13:1).
About this color
#818DFB is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.161 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Lavender Blue (#8B88F8), ΔE 0.017 away. Black text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Lavender Blue (#8B88F8) |
| Black text | 7.13:1 |
| White text | 2.94:1 |
Values
| HEX | #818DFB |
| RGB | rgb(129, 141, 251) |
| HSL | hsl(234, 94%, 75%) |
| OKLCH | oklch(68.4% 0.161 276.6) |
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 #818DFB | 2.94:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #818DFB | 7.13:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #818DFB text on white | 2.94:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #818DFB text on black | 7.13:1 | AAA | Lc -46.1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400 (this color)
#818DFB
oklch(68.4% 0.161 276.6)
-
Step 500
500
#6E76FF
oklch(63.1% 0.2 276.5)
-
Step 600
600
#5958F2
oklch(55.6% 0.224 276.5)
-
Step 700
700
#4A46D3
oklch(49.1% 0.209 276.7)
-
Step 800
800
#3C3BAA
oklch(42.7% 0.172 276.6)
-
Step 900
900
#323587
oklch(37.8% 0.134 276.3)
-
Step 950
950
#1D204F
oklch(27.1% 0.085 276.4)
#818DFB 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) | #609CFF | 0.048 |
| Deuteranopia (no green cones) | #5592F9 | 0.049 |
| Tritanopia (no blue cones) | #51A4B8 | 0.141 |
| Achromatopsia (no color) | #969696 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818DFB
#818DFB
oklch(68.4% 0.161 276.6)
- #B39800
#B39800
oklch(68.4% 0.141 96.3)
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 #818DFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lavender Blue #8B88F8 ΔE 0.017
- Periwinkle #8E82FE ΔE 0.031
- Perrywinkle #8F8CE7 ΔE 0.034
- Periwinkle Blue #8F99FB ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.046
- Soft Blue #6488EA ΔE 0.047
- Cornflower #6A79F7 ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.065
Use #818DFB 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.