#818FCB
Closest named color: Faded Blue (#658CBB). oklch(66.2% 0.091 273.6), rgb(129, 143, 203).
Aa
Black text reads best on this color (6.72:1).
About this color
#818FCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.091 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.045 away. Black text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.72:1 |
| White text | 3.12:1 |
Values
| HEX | #818FCB |
| RGB | rgb(129, 143, 203) |
| HSL | hsl(229, 42%, 65%) |
| OKLCH | oklch(66.2% 0.091 273.6) |
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 #818FCB | 3.12:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #818FCB | 6.72:1 | AA | Lc 45.8 | Large or bold text, headings |
| #818FCB text on white | 3.12:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #818FCB text on black | 6.72:1 | AA | Lc -43.5 | 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
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B7BFDE
oklch(80.8% 0.045 273.9)
-
Step 400
400
#929ECE
oklch(70.7% 0.072 273.6)
-
Step 500
500 (this color)
#818FCB
oklch(66.2% 0.091 273.6)
-
Step 600
600
#616EAD
oklch(55.5% 0.099 273.9)
-
Step 700
700
#505C95
oklch(49.1% 0.093 273.5)
-
Step 800
800
#424B79
oklch(42.7% 0.077 274.3)
-
Step 900
900
#373F61
oklch(37.6% 0.059 273.1)
-
Step 950
950
#202539
oklch(26.9% 0.038 272.9)
#818FCB 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) | #7C95CE | 0.016 |
| Deuteranopia (no green cones) | #768FCA | 0.014 |
| Tritanopia (no blue cones) | #6B9BA4 | 0.082 |
| Achromatopsia (no color) | #929292 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818FCB
#818FCB
oklch(66.2% 0.091 273.6)
- #A6924E
#A6924E
oklch(66.3% 0.091 93.4)
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 #818FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.045
- Perrywinkle #8F8CE7 ΔE 0.049
- Silver Lake Blue #778DA9 ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.057
- Cool Gray #8D99AE ΔE 0.061
- Blue Grey #758DA3 ΔE 0.064
- Soft Blue #6488EA ΔE 0.065
- Heather #A484AC ΔE 0.066
Use #818FCB 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.