#818FEB
Closest named color: Perrywinkle (#8F8CE7). oklch(67.9% 0.136 275.6), rgb(129, 143, 235).
Aa
Black text reads best on this color (7.06:1).
About this color
#818FEB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.136 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.020 away. Black text reads best on it, at 7.06:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 7.06:1 |
| White text | 2.97:1 |
Values
| HEX | #818FEB |
| RGB | rgb(129, 143, 235) |
| HSL | hsl(232, 73%, 71%) |
| OKLCH | oklch(67.9% 0.136 275.6) |
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 #818FEB | 2.97:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #818FEB | 7.06:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #818FEB text on white | 2.97:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #818FEB text on black | 7.06:1 | AAA | Lc -45.6 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7F9
oklch(88.5% 0.047 276.2)
-
Step 300
300
#B1BDF8
oklch(81% 0.085 275.4)
-
Step 400
400 (this color)
#818FEB
oklch(67.9% 0.136 275.6)
-
Step 500
500
#6E7BF1
oklch(63.1% 0.175 275.5)
-
Step 600
600
#5961DF
oklch(55.6% 0.189 275.6)
-
Step 700
700
#494FC2
oklch(49.1% 0.177 275.5)
-
Step 800
800
#3C429D
oklch(42.8% 0.146 275.5)
-
Step 900
900
#32397C
oklch(37.7% 0.112 275.1)
-
Step 950
950
#1D2249
oklch(27% 0.072 275)
#818FEB 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) | #6D9AEF | 0.034 |
| Deuteranopia (no green cones) | #6492E9 | 0.035 |
| Tritanopia (no blue cones) | #5CA2B2 | 0.120 |
| Achromatopsia (no color) | #969696 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FEB
#818FEB
oklch(67.9% 0.136 275.6)
- #B29610
#B29610
oklch(67.9% 0.136 95.3)
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 #818FEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.020
- Lavender Blue #8B88F8 ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.035
- Periwinkle Blue #8F99FB ΔE 0.039
- Soft Blue #6488EA ΔE 0.042
- Periwinkle #8E82FE ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.067
Use #818FEB 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.