#818BF4
Closest named color: Lavender Blue (#8B88F8). oklch(67.6% 0.154 277.3), rgb(129, 139, 244).
Aa
Black text reads best on this color (6.93:1).
About this color
#818BF4 is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.154 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Lavender Blue (#8B88F8), ΔE 0.016 away. Black text reads best on it, at 6.93:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Lavender Blue (#8B88F8) |
| Black text | 6.93:1 |
| White text | 3.02:1 |
Values
| HEX | #818BF4 |
| RGB | rgb(129, 139, 244) |
| HSL | hsl(235, 84%, 73%) |
| OKLCH | oklch(67.6% 0.154 277.3) |
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 #818BF4 | 3.02:1 | AA large text | Lc -62.3 | Content text, not long reading |
| Black text on #818BF4 | 6.93:1 | AA | Lc 47.1 | Large or bold text, headings |
| #818BF4 text on white | 3.02:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #818BF4 text on black | 6.93:1 | AA | Lc -44.9 | Non-text elements, placeholder text |
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
#E5E9FD
oklch(93.7% 0.027 276.8)
-
Step 200
200
#D0D7FD
oklch(88.6% 0.053 277)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400 (this color)
#818BF4
oklch(67.6% 0.154 277.3)
-
Step 500
500
#7076FD
oklch(63.1% 0.197 277.2)
-
Step 600
600
#5B5AEC
oklch(55.6% 0.214 277.2)
-
Step 700
700
#4C48CD
oklch(49% 0.199 277.5)
-
Step 800
800
#3E3DA6
oklch(42.8% 0.164 277.3)
-
Step 900
900
#343584
oklch(37.7% 0.13 277.6)
-
Step 950
950
#1E204D
oklch(27% 0.081 277.5)
#818BF4 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) | #6199F8 | 0.047 |
| Deuteranopia (no green cones) | #5890F2 | 0.047 |
| Tritanopia (no blue cones) | #56A1B4 | 0.135 |
| Achromatopsia (no color) | #949494 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818BF4
#818BF4
oklch(67.6% 0.154 277.3)
- #AF9600
#AF9600
oklch(67.5% 0.139 97.2)
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 #818BF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lavender Blue #8B88F8 ΔE 0.016
- Perrywinkle #8F8CE7 ΔE 0.028
- Periwinkle #8E82FE ΔE 0.032
- Soft Blue #6488EA ΔE 0.041
- Periwinkle Blue #8F99FB ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.043
- Cornflower #6A79F7 ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.063
Use #818BF4 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.