#91B8EF
Closest named color: Carolina Blue (#8AB8FE). oklch(77.5% 0.09 257), rgb(145, 184, 239).
Aa
Black text reads best on this color (10.30:1).
About this color
#91B8EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 77%, its chroma 0.090 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.023 away. Black text reads best on it, at 10.30:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 10.30:1 |
| White text | 2.03:1 |
Values
| HEX | #91B8EF |
| RGB | rgb(145, 184, 239) |
| HSL | hsl(215, 75%, 75%) |
| OKLCH | oklch(77.5% 0.09 257) |
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 #91B8EF | 2.03:1 | Fails | Lc -44.1 | Non-text elements, placeholder text |
| Black text on #91B8EF | 10.30:1 | AAA | Lc 64.3 | Content text, not long reading |
| #91B8EF text on white | 2.03:1 | Fails | Lc 39.6 | Non-text elements, placeholder text |
| #91B8EF text on black | 10.30:1 | AAA | Lc -62.7 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300 (this color)
#91B8EF
oklch(77.5% 0.09 257)
-
Step 400
400
#63A2F9
oklch(70.8% 0.144 256.8)
-
Step 500
500
#3487F5
oklch(63.1% 0.183 257)
-
Step 600
600
#006EE3
oklch(55.7% 0.197 256.9)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#0D3F7F
oklch(37.6% 0.12 257.1)
-
Step 950
950
#0A264B
oklch(27.1% 0.076 256.8)
#91B8EF 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) | #A4BBF2 | 0.026 |
| Deuteranopia (no green cones) | #99B2EE | 0.017 |
| Tritanopia (no blue cones) | #71C4CB | 0.079 |
| Achromatopsia (no color) | #B6B6B6 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B8EF
#91B8EF
oklch(77.5% 0.09 257)
- #D6AF73
#D6AF73
oklch(77.5% 0.09 77.6)
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 #91B8EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.023
- Pastel Blue #A2BFFE ΔE 0.035
- Lightblue #7BC8F6 ΔE 0.044
- Light Grey Blue #9DBCD4 ΔE 0.046
- Light Cornflower Blue #98C1D9 ΔE 0.047
- Sky #82CAFC ΔE 0.047
- Light Sky Blue #87CEFA ΔE 0.056
- Cloudy Blue #ACC2D9 ΔE 0.058
Use #91B8EF 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.