#B1B8EA
Closest named color: Pastel Blue (#A2BFFE). oklch(79.4% 0.071 278.4), rgb(177, 184, 234).
Aa
Black text reads best on this color (10.91:1).
About this color
#B1B8EA is a light, moderately saturated blue. In OKLCH its lightness is 79%, its chroma 0.071 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Pastel Blue (#A2BFFE), ΔE 0.033 away. Black text reads best on it, at 10.91:1.
| Hue family | Blues |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Pastel Blue (#A2BFFE) |
| Black text | 10.91:1 |
| White text | 1.92:1 |
Values
| HEX | #B1B8EA |
| RGB | rgb(177, 184, 234) |
| HSL | hsl(233, 58%, 81%) |
| OKLCH | oklch(79.4% 0.071 278.4) |
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 #B1B8EA | 1.92:1 | Fails | Lc -41.1 | Non-text elements, placeholder text |
| Black text on #B1B8EA | 10.91:1 | AAA | Lc 67.1 | Content text, not long reading |
| #B1B8EA text on white | 1.92:1 | Fails | Lc 36.8 | Non-text elements, placeholder text |
| #B1B8EA text on black | 10.91:1 | AAA | Lc -65.7 | Content text, not long reading |
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 300.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D3D7F4
oklch(88.5% 0.04 279.3)
-
Step 300
300 (this color)
#B1B8EA
oklch(79.4% 0.071 278.4)
-
Step 400
400
#9199E7
oklch(70.8% 0.114 278.6)
-
Step 500
500
#777EE0
oklch(63.2% 0.146 278.3)
-
Step 600
600
#6165CD
oklch(55.7% 0.158 278.3)
-
Step 700
700
#5153B2
oklch(49.2% 0.148 278.6)
-
Step 800
800
#424490
oklch(42.7% 0.123 278.7)
-
Step 900
900
#373A73
oklch(37.6% 0.096 278.5)
-
Step 950
950
#202343
oklch(27.1% 0.059 277.6)
#B1B8EA 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) | #AABDEC | 0.015 |
| Deuteranopia (no green cones) | #A7B9E9 | 0.013 |
| Tritanopia (no blue cones) | #A3C1C9 | 0.064 |
| Achromatopsia (no color) | #BBBBBB | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1B8EA
#B1B8EA
oklch(79.4% 0.071 278.4)
- #C7BD88
#C7BD88
oklch(79.4% 0.071 98.7)
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 #B1B8EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pastel Blue #A2BFFE ΔE 0.033
- Light Steel Blue #B0C4DE ΔE 0.041
- Cloudy Blue #ACC2D9 ΔE 0.042
- Light Grey Blue #9DBCD4 ΔE 0.046
- Light Periwinkle #C1C6FC ΔE 0.047
- Light Cornflower Blue #98C1D9 ΔE 0.050
- Light Blue Grey #B7C9E2 ΔE 0.052
- Carolina Blue #8AB8FE ΔE 0.054
Use #B1B8EA 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.