#91ACEF
Closest named color: Carolina Blue (#8AB8FE). oklch(75% 0.102 267.1), rgb(145, 172, 239).
Aa
Black text reads best on this color (9.35:1).
About this color
#91ACEF is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.102 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Carolina Blue (#8AB8FE), ΔE 0.033 away. Black text reads best on it, at 9.35:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Carolina Blue (#8AB8FE) |
| Black text | 9.35:1 |
| White text | 2.24:1 |
Values
| HEX | #91ACEF |
| RGB | rgb(145, 172, 239) |
| HSL | hsl(223, 75%, 75%) |
| OKLCH | oklch(75% 0.102 267.1) |
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 #91ACEF | 2.24:1 | Fails | Lc -49.0 | Large or bold text, headings |
| Black text on #91ACEF | 9.35:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #91ACEF text on white | 2.24:1 | Fails | Lc 44.2 | Non-text elements, placeholder text |
| #91ACEF text on black | 9.35:1 | AAA | Lc -57.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#AEC0EB
oklch(80.9% 0.064 267.2)
-
Step 400
400 (this color)
#91ACEF
oklch(75% 0.102 267.1)
-
Step 500
500
#6685D8
oklch(63.1% 0.13 267.2)
-
Step 600
600
#4E6DC5
oklch(55.5% 0.141 267.1)
-
Step 700
700
#3F5BAB
oklch(49.2% 0.132 267)
-
Step 800
800
#344B8A
oklch(42.8% 0.108 266.8)
-
Step 900
900
#2D3F6E
oklch(37.7% 0.084 266.6)
-
Step 950
950
#1B2541
oklch(27% 0.054 267.8)
#91ACEF 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) | #95B2F2 | 0.017 |
| Deuteranopia (no green cones) | #8CA9ED | 0.011 |
| Tritanopia (no blue cones) | #72BAC4 | 0.091 |
| Achromatopsia (no color) | #ADADAD | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91ACEF
#91ACEF
oklch(75% 0.102 267.1)
- #CAAA5E
#CAAA5E
oklch(75% 0.102 87)
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 #91ACEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Carolina Blue #8AB8FE ΔE 0.033
- Pastel Blue #A2BFFE ΔE 0.057
- Periwinkle Blue #8F99FB ΔE 0.057
- Light Grey Blue #9DBCD4 ΔE 0.069
- Lightblue #7BC8F6 ΔE 0.074
- Light Cornflower Blue #98C1D9 ΔE 0.074
- Sky #82CAFC ΔE 0.077
- Perrywinkle #8F8CE7 ΔE 0.083
Use #91ACEF 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.