#4B9FCB
Closest named color: Greyblue (#77A1B5). oklch(66.9% 0.104 234.2), rgb(75, 159, 203).
Aa
Black text reads best on this color (7.12:1).
About this color
#4B9FCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.104 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.053 away. Black text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.12:1 |
| White text | 2.94:1 |
Values
| HEX | #4B9FCB |
| RGB | rgb(75, 159, 203) |
| HSL | hsl(201, 55%, 55%) |
| OKLCH | oklch(66.9% 0.104 234.2) |
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 #4B9FCB | 2.94:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #4B9FCB | 7.12:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #4B9FCB text on white | 2.94:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #4B9FCB text on black | 7.12:1 | AAA | Lc -46.0 | 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 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A1C7DD
oklch(80.9% 0.051 233.6)
-
Step 400
400
#6CA9CC
oklch(70.7% 0.081 234.8)
-
Step 500
500 (this color)
#4B9FCB
oklch(66.9% 0.104 234.2)
-
Step 600
600
#0F7DAB
oklch(55.6% 0.113 234.1)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#065677
oklch(42.7% 0.087 233.8)
-
Step 900
900
#144760
oklch(37.7% 0.068 234.3)
-
Step 950
950
#0E2A38
oklch(27.1% 0.042 233.2)
#4B9FCB 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) | #8A9ECD | 0.066 |
| Deuteranopia (no green cones) | #7891CA | 0.055 |
| Tritanopia (no blue cones) | #00ABAE | 0.070 |
| Achromatopsia (no color) | #969696 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B9FCB
#4B9FCB
oklch(66.9% 0.104 234.2)
- #C68355
#C68355
oklch(66.9% 0.103 54.5)
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 #4B9FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
- Turquoise Blue #06B1C4 ΔE 0.059
- Cadet Blue #5F9EA0 ΔE 0.065
- Chefchaouen Blue #4895EF ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.068
- Cornflower Blue #6495ED ΔE 0.068
- Silver Lake Blue #778DA9 ΔE 0.068
Use #4B9FCB 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.