#99BBFF
Closest named color: Pastel Blue (#A2BFFE). oklch(79.3% 0.104 263.7), rgb(153, 187, 255).
Aa
Black text reads best on this color (10.90:1).
About this color
#99BBFF is a light, moderately saturated blue. In OKLCH its lightness is 79%, its chroma 0.104 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Pastel Blue (#A2BFFE), ΔE 0.016 away. Black text reads best on it, at 10.90:1.
| Hue family | Blues |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Pastel Blue (#A2BFFE) |
| Black text | 10.90:1 |
| White text | 1.92:1 |
Values
| HEX | #99BBFF |
| RGB | rgb(153, 187, 255) |
| HSL | hsl(220, 100%, 80%) |
| OKLCH | oklch(79.3% 0.104 263.7) |
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 #99BBFF | 1.92:1 | Fails | Lc -41.1 | Non-text elements, placeholder text |
| Black text on #99BBFF | 10.90:1 | AAA | Lc 67.1 | Content text, not long reading |
| #99BBFF text on white | 1.92:1 | Fails | Lc 36.8 | Non-text elements, placeholder text |
| #99BBFF text on black | 10.90:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300 (this color)
#99BBFF
oklch(79.3% 0.104 263.7)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4880FF
oklch(63% 0.198 263.8)
-
Step 600
600
#2662F8
oklch(55.6% 0.232 263.8)
-
Step 700
700
#1A50D8
oklch(49.1% 0.215 263.7)
-
Step 800
800
#1743AE
oklch(42.7% 0.177 263.6)
-
Step 900
900
#183A8A
oklch(37.7% 0.139 263.6)
-
Step 950
950
#0F2351
oklch(27.1% 0.088 263.8)
#99BBFF 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) | #A3C0FF | 0.019 |
| Deuteranopia (no green cones) | #99B7FD | 0.010 |
| Tritanopia (no blue cones) | #77C9D3 | 0.092 |
| Achromatopsia (no color) | #BBBBBB | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99BBFF
#99BBFF
oklch(79.3% 0.104 263.7)
- #DBB66A
#DBB66A
oklch(79.3% 0.104 84.1)
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 #99BBFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pastel Blue #A2BFFE ΔE 0.016
- Carolina Blue #8AB8FE ΔE 0.020
- Sky #82CAFC ΔE 0.046
- Lightblue #7BC8F6 ΔE 0.049
- Light Sky Blue #87CEFA ΔE 0.055
- Baby Blue #A2CFFE ΔE 0.056
- Light Periwinkle #C1C6FC ΔE 0.062
- Light Cornflower Blue #98C1D9 ΔE 0.062
Use #99BBFF 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.