#818FEF
Closest named color: Perrywinkle (#8F8CE7). oklch(68.1% 0.142 275.7), rgb(129, 143, 239).
Aa
Black text reads best on this color (7.10:1).
About this color
#818FEF is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.142 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.022 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #818FEF |
| RGB | rgb(129, 143, 239) |
| HSL | hsl(232, 77%, 72%) |
| OKLCH | oklch(68.1% 0.142 275.7) |
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 #818FEF | 2.95:1 | Fails | Lc -61.3 | Content text, not long reading |
| Black text on #818FEF | 7.10:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #818FEF text on white | 2.95:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #818FEF text on black | 7.10:1 | AAA | Lc -45.9 | 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
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B0BCFA
oklch(80.8% 0.089 275.8)
-
Step 400
400 (this color)
#818FEF
oklch(68.1% 0.142 275.7)
-
Step 500
500
#6E7AF5
oklch(63.2% 0.182 275.7)
-
Step 600
600
#585FE3
oklch(55.5% 0.197 275.6)
-
Step 700
700
#494DC6
oklch(49.1% 0.184 275.8)
-
Step 800
800
#3C40A0
oklch(42.7% 0.153 276)
-
Step 900
900
#32387F
oklch(37.7% 0.118 275.5)
-
Step 950
950
#1D214A
oklch(26.9% 0.075 275.9)
#818FEF 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) | #6B9BF3 | 0.037 |
| Deuteranopia (no green cones) | #6192ED | 0.038 |
| Tritanopia (no blue cones) | #59A3B3 | 0.126 |
| Achromatopsia (no color) | #969696 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FEF
#818FEF
oklch(68.1% 0.142 275.7)
- #B39700
#B39700
oklch(68.1% 0.14 95.7)
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 #818FEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.022
- Lavender Blue #8B88F8 ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.036
- Periwinkle Blue #8F99FB ΔE 0.036
- Soft Blue #6488EA ΔE 0.043
- Periwinkle #8E82FE ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.068
Use #818FEF 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.