#91B5EE
Closest named color: Carolina Blue (#8AB8FE). oklch(76.8% 0.091 259.4), rgb(145, 181, 238).
Aa
Black text reads best on this color (10.04:1).
About this color
#91B5EE is a medium-light, moderately saturated blue. In OKLCH its lightness is 77%, its chroma 0.091 and its hue 259°. 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 10.04:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 10.04:1 |
| White text | 2.08:1 |
Values
| HEX | #91B5EE |
| RGB | rgb(145, 181, 238) |
| HSL | hsl(217, 73%, 75%) |
| OKLCH | oklch(76.8% 0.091 259.4) |
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 #91B5EE | 2.08:1 | Fails | Lc -45.4 | Large or bold text, headings |
| Black text on #91B5EE | 10.04:1 | AAA | Lc 63.1 | Content text, not long reading |
| #91B5EE text on white | 2.08:1 | Fails | Lc 40.8 | Non-text elements, placeholder text |
| #91B5EE text on black | 10.04:1 | AAA | Lc -61.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300 (this color)
#91B5EE
oklch(76.8% 0.091 259.4)
-
Step 400
400
#68A0FA
oklch(70.7% 0.145 259.5)
-
Step 500
500
#3D85F8
oklch(63.1% 0.187 259.5)
-
Step 600
600
#186BE7
oklch(55.6% 0.203 259.5)
-
Step 700
700
#0758C9
oklch(49.1% 0.189 259.5)
-
Step 800
800
#0D49A2
oklch(42.7% 0.156 259.4)
-
Step 900
900
#143E81
oklch(37.7% 0.122 259.7)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#91B5EE 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) | #A1B8F1 | 0.022 |
| Deuteranopia (no green cones) | #96AFED | 0.016 |
| Tritanopia (no blue cones) | #72C1C8 | 0.081 |
| Achromatopsia (no color) | #B3B3B3 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B5EE
#91B5EE
oklch(76.8% 0.091 259.4)
- #D3AD6F
#D3AD6F
oklch(76.8% 0.091 79)
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 #91B5EE, 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 0.040
- Light Grey Blue #9DBCD4 ΔE 0.049
- Lightblue #7BC8F6 ΔE 0.051
- Light Cornflower Blue #98C1D9 ΔE 0.052
- Sky #82CAFC ΔE 0.054
- Cloudy Blue #ACC2D9 ΔE 0.064
- Light Sky Blue #87CEFA ΔE 0.064
Use #91B5EE 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.