#4C91DF
Closest named color: Dark Sky Blue (#448EE4). oklch(64.7% 0.137 253.1), rgb(76, 145, 223).
Aa
Black text reads best on this color (6.42:1).
About this color
#4C91DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.137 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.014 away. Black text reads best on it, at 6.42:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.42:1 |
| White text | 3.26:1 |
Values
| HEX | #4C91DF |
| RGB | rgb(76, 145, 223) |
| HSL | hsl(212, 70%, 59%) |
| OKLCH | oklch(64.7% 0.137 253.1) |
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 #4C91DF | 3.26:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #4C91DF | 6.42:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #4C91DF text on white | 3.26:1 | AA large text | Lc 59.8 | Large or bold text, headings |
| #4C91DF text on black | 6.42:1 | AA | Lc -42.0 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A3C4EB
oklch(81% 0.066 252.8)
-
Step 400
400
#6FA4E2
oklch(70.7% 0.107 253.1)
-
Step 500
500 (this color)
#4C91DF
oklch(64.7% 0.137 253.1)
-
Step 600
600
#2574C7
oklch(55.5% 0.149 253.2)
-
Step 700
700
#1761AC
oklch(49.1% 0.138 253.2)
-
Step 800
800
#16508B
oklch(42.8% 0.114 252.7)
-
Step 900
900
#1A436F
oklch(37.8% 0.088 252.6)
-
Step 950
950
#102741
oklch(26.9% 0.057 253.1)
#4C91DF 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) | #6F96E2 | 0.040 |
| Deuteranopia (no green cones) | #5A88DD | 0.025 |
| Tritanopia (no blue cones) | #00A3AD | 0.108 |
| Achromatopsia (no color) | #8E8E8E | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C91DF
#4C91DF
oklch(64.7% 0.137 253.1)
- #C07F05
#C07F05
oklch(64.8% 0.137 73)
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 #4C91DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.014
- Chefchaouen Blue #4895EF ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.034
- Soft Blue #6488EA ΔE 0.038
- Dodger Blue #1E90FF ΔE 0.054
- Water Blue #0E87CC ΔE 0.055
- Faded Blue #658CBB ΔE 0.056
- Cool Blue #4984B8 ΔE 0.064
Use #4C91DF 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.