#818DEE
Closest named color: Perrywinkle (#8F8CE7). oklch(67.6% 0.143 276.5), rgb(129, 141, 238).
Aa
Black text reads best on this color (6.97:1).
About this color
#818DEE is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.143 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.021 away. Black text reads best on it, at 6.97:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 6.97:1 |
| White text | 3.00:1 |
Values
| HEX | #818DEE |
| RGB | rgb(129, 141, 238) |
| HSL | hsl(233, 76%, 72%) |
| OKLCH | oklch(67.6% 0.143 276.5) |
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 #818DEE | 3.00:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #818DEE | 6.97:1 | AA | Lc 47.4 | Large or bold text, headings |
| #818DEE text on white | 3.00:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #818DEE text on black | 6.97:1 | AA | Lc -45.1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FB
oklch(88.5% 0.05 276.6)
-
Step 300
300
#B1BCFB
oklch(80.9% 0.09 276.5)
-
Step 400
400 (this color)
#818DEE
oklch(67.6% 0.143 276.5)
-
Step 500
500
#7079F5
oklch(63.1% 0.183 276.7)
-
Step 600
600
#5A5EE4
oklch(55.6% 0.199 276.5)
-
Step 700
700
#4B4CC6
oklch(49% 0.185 276.8)
-
Step 800
800
#3D40A0
oklch(42.8% 0.152 276.5)
-
Step 900
900
#33377F
oklch(37.6% 0.12 276.6)
-
Step 950
950
#1E214A
oklch(27% 0.075 277)
#818DEE 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) | #6899F2 | 0.039 |
| Deuteranopia (no green cones) | #5F91EC | 0.040 |
| Tritanopia (no blue cones) | #5AA1B2 | 0.126 |
| Achromatopsia (no color) | #959595 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818DEE
#818DEE
oklch(67.6% 0.143 276.5)
- #B09600
#B09600
oklch(67.6% 0.139 96.7)
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 #818DEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.021
- Lavender Blue #8B88F8 ΔE 0.025
- Cornflower Blue #6495ED ΔE 0.038
- Soft Blue #6488EA ΔE 0.040
- Periwinkle Blue #8F99FB ΔE 0.040
- Periwinkle #8E82FE ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.060
- Cornflower #6A79F7 ΔE 0.065
Use #818DEE 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.