#91B1DF
Closest named color: Light Grey Blue (#9DBCD4). oklch(75.3% 0.075 257.4), rgb(145, 177, 223).
Aa
Black text reads best on this color (9.55:1).
About this color
#91B1DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.075 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.042 away. Black text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 9.55:1 |
| White text | 2.19:1 |
Values
| HEX | #91B1DF |
| RGB | rgb(145, 177, 223) |
| HSL | hsl(215, 55%, 72%) |
| OKLCH | oklch(75.3% 0.075 257.4) |
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 #91B1DF | 2.19:1 | Fails | Lc -48.0 | Large or bold text, headings |
| Black text on #91B1DF | 9.55:1 | AAA | Lc 60.8 | Content text, not long reading |
| #91B1DF text on white | 2.19:1 | Fails | Lc 43.2 | Non-text elements, placeholder text |
| #91B1DF text on black | 9.55:1 | AAA | Lc -59.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400 (this color)
#91B1DF
oklch(75.3% 0.075 257.4)
-
Step 500
500
#648BC3
oklch(63.1% 0.096 257.4)
-
Step 600
600
#4A74B0
oklch(55.6% 0.105 257.4)
-
Step 700
700
#3B6197
oklch(49% 0.097 257.3)
-
Step 800
800
#31507B
oklch(42.8% 0.081 256.8)
-
Step 900
900
#2C4263
oklch(37.7% 0.063 258.3)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#91B1DF 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) | #A1B3E1 | 0.022 |
| Deuteranopia (no green cones) | #98ACDE | 0.015 |
| Tritanopia (no blue cones) | #79BBC0 | 0.067 |
| Achromatopsia (no color) | #AFAFAF | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B1DF
#91B1DF
oklch(75.3% 0.075 257.4)
- #CAA978
#CAA978
oklch(75.3% 0.076 77.1)
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 #91B1DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.042
- Carolina Blue #8AB8FE ΔE 0.044
- Light Cornflower Blue #98C1D9 ΔE 0.049
- Pastel Blue #A2BFFE ΔE 0.058
- Cool Steel #97A7B3 ΔE 0.062
- Lightblue #7BC8F6 ΔE 0.062
- Cloudy Blue #ACC2D9 ΔE 0.063
- French Gray #ADB5BD ΔE 0.063
Use #91B1DF 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.