#4B91DB
Closest named color: Dark Sky Blue (#448EE4). oklch(64.5% 0.132 251.7), rgb(75, 145, 219).
Aa
Black text reads best on this color (6.37:1).
About this color
#4B91DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.132 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.018 away. Black text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #4B91DB |
| RGB | rgb(75, 145, 219) |
| HSL | hsl(211, 67%, 58%) |
| OKLCH | oklch(64.5% 0.132 251.7) |
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 #4B91DB | 3.29:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #4B91DB | 6.37:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #4B91DB text on white | 3.29:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #4B91DB text on black | 6.37:1 | AA | Lc -41.7 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A3C4EA
oklch(80.9% 0.065 252.2)
-
Step 400
400
#6FA5DF
oklch(70.8% 0.103 251.1)
-
Step 500
500 (this color)
#4B91DB
oklch(64.5% 0.132 251.7)
-
Step 600
600
#2475C4
oklch(55.5% 0.144 251.8)
-
Step 700
700
#1662A9
oklch(49.1% 0.133 251.8)
-
Step 800
800
#165089
oklch(42.6% 0.111 252)
-
Step 900
900
#1A436E
oklch(37.7% 0.087 252.1)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#4B91DB 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) | #7195DE | 0.042 |
| Deuteranopia (no green cones) | #5C87DA | 0.029 |
| Tritanopia (no blue cones) | #00A2AC | 0.103 |
| Achromatopsia (no color) | #8E8E8E | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B91DB
#4B91DB
oklch(64.5% 0.132 251.7)
- #BF7E17
#BF7E17
oklch(64.5% 0.132 71.4)
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 #4B91DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.039
- Soft Blue #6488EA ΔE 0.043
- Faded Blue #658CBB ΔE 0.051
- Water Blue #0E87CC ΔE 0.052
- Cool Blue #4984B8 ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.059
Use #4B91DB 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.