#818BBE
Closest named color: Faded Blue (#658CBB). oklch(64.8% 0.077 275.5), rgb(129, 139, 190).
Aa
Black text reads best on this color (6.37:1).
About this color
#818BBE is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.077 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.036 away. Black text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #818BBE |
| RGB | rgb(129, 139, 190) |
| HSL | hsl(230, 32%, 63%) |
| OKLCH | oklch(64.8% 0.077 275.5) |
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 #818BBE | 3.29:1 | AA large text | Lc -65.8 | Content text, not long reading |
| Black text on #818BBE | 6.37:1 | AA | Lc 43.8 | Non-text elements, placeholder text |
| #818BBE text on white | 3.29:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #818BBE text on black | 6.37:1 | AA | Lc -41.4 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F1
oklch(93.5% 0.011 274.9)
-
Step 200
200
#D5D8E7
oklch(88.4% 0.021 276.9)
-
Step 300
300
#B9BFDA
oklch(80.9% 0.039 275.6)
-
Step 400
400
#959EC7
oklch(70.7% 0.061 275.1)
-
Step 500
500 (this color)
#818BBE
oklch(64.8% 0.077 275.5)
-
Step 600
600
#656FA4
oklch(55.6% 0.083 275.2)
-
Step 700
700
#545D8D
oklch(49.2% 0.078 275.1)
-
Step 800
800
#454C72
oklch(42.7% 0.064 275.4)
-
Step 900
900
#3A3F5C
oklch(37.6% 0.05 276.2)
-
Step 950
950
#222536
oklch(27% 0.032 276.3)
#818BBE 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) | #7B90C0 | 0.015 |
| Deuteranopia (no green cones) | #778BBD | 0.014 |
| Tritanopia (no blue cones) | #71959D | 0.069 |
| Achromatopsia (no color) | #8E8E8E | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #818BBE
#818BBE
oklch(64.8% 0.077 275.5)
- #9D8F57
#9D8F57
oklch(64.9% 0.077 95.8)
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 #818BBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.038
- Blue Grey #758DA3 ΔE 0.048
- Cool Gray #8D99AE ΔE 0.055
- Heather #A484AC ΔE 0.056
- Lavender Gray #7E7F9A ΔE 0.057
- Light Slate Gray #778899 ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.059
Use #818BBE 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.