#91B9DF
Closest named color: Light Grey Blue (#9DBCD4). oklch(77% 0.07 247.4), rgb(145, 185, 223).
Aa
Black text reads best on this color (10.20:1).
About this color
#91B9DF is a medium-light, muted blue. In OKLCH its lightness is 77%, its chroma 0.070 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Light Grey Blue (#9DBCD4), ΔE 0.024 away. Black text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Light Grey Blue (#9DBCD4) |
| Black text | 10.20:1 |
| White text | 2.05:1 |
Values
| HEX | #91B9DF |
| RGB | rgb(145, 185, 223) |
| HSL | hsl(209, 55%, 72%) |
| OKLCH | oklch(77% 0.07 247.4) |
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 #91B9DF | 2.05:1 | Fails | Lc -44.6 | Non-text elements, placeholder text |
| Black text on #91B9DF | 10.20:1 | AAA | Lc 63.9 | Content text, not long reading |
| #91B9DF text on white | 2.05:1 | Fails | Lc 40.1 | Non-text elements, placeholder text |
| #91B9DF text on black | 10.20:1 | AAA | Lc -62.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300 (this color)
#91B9DF
oklch(77% 0.07 247.4)
-
Step 400
400
#64A6E2
oklch(70.6% 0.111 247.5)
-
Step 500
500
#328FDA
oklch(63.1% 0.142 247.2)
-
Step 600
600
#0077C4
oklch(55.5% 0.148 247.6)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#0B4470
oklch(37.7% 0.093 247.8)
-
Step 950
950
#0A2841
oklch(26.9% 0.058 247.4)
#91B9DF 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) | #AAB9E1 | 0.031 |
| Deuteranopia (no green cones) | #A0B1DE | 0.026 |
| Tritanopia (no blue cones) | #78C2C5 | 0.059 |
| Achromatopsia (no color) | #B5B5B5 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91B9DF
#91B9DF
oklch(77% 0.07 247.4)
- #D3AC85
#D3AC85
oklch(77% 0.07 66.5)
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 #91B9DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Blue #9DBCD4 ΔE 0.024
- Light Cornflower Blue #98C1D9 ΔE 0.028
- Cloudy Blue #ACC2D9 ΔE 0.045
- Lightblue #7BC8F6 ΔE 0.046
- Carolina Blue #8AB8FE ΔE 0.046
- Pastel Blue #A2BFFE ΔE 0.051
- Light Steel Blue #B0C4DE ΔE 0.051
- Sky #82CAFC ΔE 0.052
Use #91B9DF 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.