#818ACE
Closest named color: Perrywinkle (#8F8CE7). oklch(65.4% 0.102 277.4), rgb(129, 138, 206).
Aa
Black text reads best on this color (6.46:1).
About this color
#818ACE is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.102 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Perrywinkle (#8F8CE7), ΔE 0.043 away. Black text reads best on it, at 6.46:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Perrywinkle (#8F8CE7) |
| Black text | 6.46:1 |
| White text | 3.25:1 |
Values
| HEX | #818ACE |
| RGB | rgb(129, 138, 206) |
| HSL | hsl(233, 44%, 66%) |
| OKLCH | oklch(65.4% 0.102 277.4) |
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 #818ACE | 3.25:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #818ACE | 6.46:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #818ACE text on white | 3.25:1 | AA large text | Lc 59.7 | Large or bold text, headings |
| #818ACE text on black | 6.46:1 | AA | Lc -42.0 | 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 500.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8EC
oklch(88.5% 0.028 276.8)
-
Step 300
300
#B8BEE1
oklch(80.8% 0.05 277.6)
-
Step 400
400
#949CD2
oklch(70.6% 0.079 277.6)
-
Step 500
500 (this color)
#818ACE
oklch(65.4% 0.102 277.4)
-
Step 600
600
#646CB3
oklch(55.6% 0.11 277.3)
-
Step 700
700
#535A9A
oklch(49.2% 0.102 277.2)
-
Step 800
800
#44497D
oklch(42.6% 0.086 277.9)
-
Step 900
900
#393E64
oklch(37.7% 0.065 277.1)
-
Step 950
950
#21243B
oklch(26.9% 0.043 277.4)
#818ACE 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) | #7492D1 | 0.025 |
| Deuteranopia (no green cones) | #6F8CCC | 0.024 |
| Tritanopia (no blue cones) | #6B97A3 | 0.089 |
| Achromatopsia (no color) | #8F8F8F | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818ACE
#818ACE
oklch(65.4% 0.102 277.4)
- #A19041
#A19041
oklch(65.2% 0.102 97.3)
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 #818ACE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Perrywinkle #8F8CE7 ΔE 0.043
- Faded Blue #658CBB ΔE 0.048
- Soft Blue #6488EA ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.056
- Silver Lake Blue #778DA9 ΔE 0.062
- Wisteria #A87DC2 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.066
- Heather #A484AC ΔE 0.069
Use #818ACE 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.