#4990DB
Closest named color: Dark Sky Blue (#448EE4). oklch(64.2% 0.134 251.8), rgb(73, 144, 219).
Aa
Black text reads best on this color (6.29:1).
About this color
#4990DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.134 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.016 away. Black text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.29:1 |
| White text | 3.33:1 |
Values
| HEX | #4990DB |
| RGB | rgb(73, 144, 219) |
| HSL | hsl(211, 67%, 57%) |
| OKLCH | oklch(64.2% 0.134 251.8) |
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 #4990DB | 3.33:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #4990DB | 6.29:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #4990DB text on white | 3.33:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #4990DB text on black | 6.29:1 | AA | Lc -41.2 | 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
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6FA5E0
oklch(70.8% 0.104 251.5)
-
Step 500
500 (this color)
#4990DB
oklch(64.2% 0.134 251.8)
-
Step 600
600
#2375C5
oklch(55.6% 0.146 251.9)
-
Step 700
700
#1462AA
oklch(49.1% 0.135 251.8)
-
Step 800
800
#15508A
oklch(42.7% 0.113 252.1)
-
Step 900
900
#19436E
oklch(37.7% 0.087 251.7)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#4990DB 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) | #6F94DE | 0.042 |
| Deuteranopia (no green cones) | #5A86DA | 0.029 |
| Tritanopia (no blue cones) | #00A2AB | 0.105 |
| Achromatopsia (no color) | #8D8D8D | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4990DB
#4990DB
oklch(64.2% 0.134 251.8)
- #BE7D10
#BE7D10
oklch(64.2% 0.134 71.9)
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 #4990DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.016
- Chefchaouen Blue #4895EF ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.041
- Soft Blue #6488EA ΔE 0.042
- Water Blue #0E87CC ΔE 0.049
- Faded Blue #658CBB ΔE 0.052
- Cool Blue #4984B8 ΔE 0.057
- Dodger Blue #1E90FF ΔE 0.057
Use #4990DB 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.