#B5DDFB
Closest named color: Light Blue (#ADD8E6). oklch(87.9% 0.059 240.8), rgb(181, 221, 251).
Aa
Black text reads best on this color (14.70:1).
About this color
#B5DDFB is a light, muted blue. In OKLCH its lightness is 88%, its chroma 0.059 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Light Blue (#ADD8E6), ΔE 0.032 away. Black text reads best on it, at 14.70:1.
| Hue family | Blues |
| Lightness | light (88%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Light Blue (#ADD8E6) |
| Black text | 14.70:1 |
| White text | 1.42:1 |
Values
| HEX | #B5DDFB |
| RGB | rgb(181, 221, 251) |
| HSL | hsl(206, 90%, 85%) |
| OKLCH | oklch(87.9% 0.059 240.8) |
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 #B5DDFB | 1.42:1 | Fails | Lc -23.4 | Dividers and decoration only |
| Black text on #B5DDFB | 14.70:1 | AAA | Lc 83.2 | Fine for body text |
| #B5DDFB text on white | 1.42:1 | Fails | Lc 20.6 | Dividers and decoration only |
| #B5DDFB text on black | 14.70:1 | AAA | Lc -82.8 | Fine for body 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 200.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DDECF7
oklch(93.5% 0.022 239.4)
-
Step 200
200 (this color)
#B5DDFB
oklch(87.9% 0.059 240.8)
-
Step 300
300
#94C8ED
oklch(81% 0.075 239.8)
-
Step 400
400
#51AAE5
oklch(70.8% 0.121 240.5)
-
Step 500
500
#0092D9
oklch(63.1% 0.147 241)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#002942
oklch(26.9% 0.063 241.6)
#B5DDFB 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) | #D0DCFD | 0.034 |
| Deuteranopia (no green cones) | #C7D4FA | 0.030 |
| Tritanopia (no blue cones) | #A0E4E7 | 0.046 |
| Achromatopsia (no color) | #D8D8D8 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5DDFB
#B5DDFB
oklch(87.9% 0.059 240.8)
- #F5CFB0
#F5CFB0
oklch(87.9% 0.06 61.1)
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 #B5DDFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Blue #ADD8E6 ΔE 0.032
- Powder Blue #B0E0E6 ΔE 0.034
- Celeste #A8DADC ΔE 0.047
- Baby Blue #A2CFFE ΔE 0.047
- Cadet Gray #CED4DA ΔE 0.050
- Light Blue Grey #B7C9E2 ΔE 0.054
- Pale Turquoise #AFEEEE ΔE 0.054
- Robin's Egg Blue #98EFF9 ΔE 0.055
Use #B5DDFB 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.