#91B5FB
Closest named color: Carolina Blue (#8AB8FE). oklch(77.4% 0.108 263.1), rgb(145, 181, 251).
Aa
Black text reads best on this color (10.20:1).
About this color
#91B5FB is a medium-light, moderately saturated blue. In OKLCH its lightness is 77%, its chroma 0.108 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.010 away. Black text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 10.20:1 |
| White text | 2.05:1 |
Values
| HEX | #91B5FB |
| RGB | rgb(145, 181, 251) |
| HSL | hsl(220, 93%, 78%) |
| OKLCH | oklch(77.4% 0.108 263.1) |
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 #91B5FB | 2.05:1 | Fails | Lc -44.6 | Non-text elements, placeholder text |
| Black text on #91B5FB | 10.20:1 | AAA | Lc 63.9 | Content text, not long reading |
| #91B5FB text on white | 2.05:1 | Fails | Lc 40.0 | Non-text elements, placeholder text |
| #91B5FB text on black | 10.20:1 | AAA | Lc -62.3 | 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
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300 (this color)
#91B5FB
oklch(77.4% 0.108 263.1)
-
Step 400
400
#6D9DFF
oklch(70.6% 0.153 263.3)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600
#1E61FD
oklch(55.6% 0.241 263.2)
-
Step 700
700
#124FDC
oklch(49.1% 0.223 263.1)
-
Step 800
800
#1142B2
oklch(42.7% 0.185 263.1)
-
Step 900
900
#153A8D
oklch(37.8% 0.144 263.1)
-
Step 950
950
#0D2352
oklch(27.1% 0.091 262.9)
#91B5FB 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) | #9CBAFE | 0.020 |
| Deuteranopia (no green cones) | #91B0F9 | 0.013 |
| Tritanopia (no blue cones) | #6BC4CE | 0.097 |
| Achromatopsia (no color) | #B5B5B5 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B5FB
#91B5FB
oklch(77.4% 0.108 263.1)
- #D7AF60
#D7AF60
oklch(77.4% 0.108 82.9)
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 #91B5FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.010
- Pastel Blue #A2BFFE ΔE 0.035
- Lightblue #7BC8F6 ΔE 0.056
- Sky #82CAFC ΔE 0.056
- Light Grey Blue #9DBCD4 ΔE 0.066
- Light Sky Blue #87CEFA ΔE 0.067
- Light Cornflower Blue #98C1D9 ΔE 0.067
- Periwinkle Blue #8F99FB ΔE 0.074
Use #91B5FB 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.