#B1B5EA
Closest named color: Pastel Blue (#A2BFFE). oklch(78.8% 0.075 281.2), rgb(177, 181, 234).
Aa
Black text reads best on this color (10.66:1).
About this color
#B1B5EA is a light, moderately saturated purple. In OKLCH its lightness is 79%, its chroma 0.075 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Pastel Blue (#A2BFFE), ΔE 0.036 away. Black text reads best on it, at 10.66:1.
| Hue family | Purples |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Pastel Blue (#A2BFFE) |
| Black text | 10.66:1 |
| White text | 1.96:1 |
Values
| HEX | #B1B5EA |
| RGB | rgb(177, 181, 234) |
| HSL | hsl(236, 58%, 81%) |
| OKLCH | oklch(78.8% 0.075 281.2) |
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 #B1B5EA | 1.96:1 | Fails | Lc -42.3 | Non-text elements, placeholder text |
| Black text on #B1B5EA | 10.66:1 | AAA | Lc 66.0 | Content text, not long reading |
| #B1B5EA text on white | 1.96:1 | Fails | Lc 37.9 | Non-text elements, placeholder text |
| #B1B5EA text on black | 10.66:1 | AAA | Lc -64.5 | 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
#E7E9F9
oklch(93.7% 0.022 280.3)
-
Step 200
200
#D4D7F5
oklch(88.6% 0.041 281)
-
Step 300
300 (this color)
#B1B5EA
oklch(78.8% 0.075 281.2)
-
Step 400
400
#9497EA
oklch(70.7% 0.121 281.3)
-
Step 500
500
#7B7BE3
oklch(63.1% 0.153 281.1)
-
Step 600
600
#6661D1
oklch(55.6% 0.168 281.5)
-
Step 700
700
#5550B5
oklch(49.1% 0.155 281.3)
-
Step 800
800
#454293
oklch(42.7% 0.129 281.1)
-
Step 900
900
#3A3975
oklch(37.8% 0.1 281.2)
-
Step 950
950
#222244
oklch(27.1% 0.062 281.4)
#B1B5EA 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) | #A7BBEC | 0.019 |
| Deuteranopia (no green cones) | #A4B7E9 | 0.018 |
| Tritanopia (no blue cones) | #A4BEC7 | 0.066 |
| Achromatopsia (no color) | #B9B9B9 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1B5EA
#B1B5EA
oklch(78.8% 0.075 281.2)
- #C4BC84
#C4BC84
oklch(78.8% 0.075 101)
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 #B1B5EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pastel Blue #A2BFFE ΔE 0.036
- Light Steel Blue #B0C4DE ΔE 0.048
- Cloudy Blue #ACC2D9 ΔE 0.049
- Light Grey Blue #9DBCD4 ΔE 0.050
- Pale Violet #CEAEFA ΔE 0.052
- Light Periwinkle #C1C6FC ΔE 0.053
- Carolina Blue #8AB8FE ΔE 0.053
- Light Cornflower Blue #98C1D9 ΔE 0.055
Use #B1B5EA 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.