#4B8BB9
Closest named color: Cool Blue (#4984B8). oklch(61.4% 0.096 241.9), rgb(75, 139, 185).
Aa
Black text reads best on this color (5.69:1).
About this color
#4B8BB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.096 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.020 away. Black text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.69:1 |
| White text | 3.68:1 |
Values
| HEX | #4B8BB9 |
| RGB | rgb(75, 139, 185) |
| HSL | hsl(205, 44%, 51%) |
| OKLCH | oklch(61.4% 0.096 241.9) |
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 #4B8BB9 | 3.68:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #4B8BB9 | 5.69:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #4B8BB9 text on white | 3.68:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #4B8BB9 text on black | 5.69:1 | AA | Lc -37.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE9
oklch(88.6% 0.026 240.7)
-
Step 300
300
#A7C5DD
oklch(80.9% 0.047 242.4)
-
Step 400
400
#76A7CC
oklch(70.7% 0.075 241.7)
-
Step 500
500 (this color)
#4B8BB9
oklch(61.4% 0.096 241.9)
-
Step 600
600
#317AAB
oklch(55.6% 0.105 241.7)
-
Step 700
700
#236693
oklch(49% 0.098 242.3)
-
Step 800
800
#1F5477
oklch(42.8% 0.08 241.3)
-
Step 900
900
#204560
oklch(37.6% 0.063 242.6)
-
Step 950
950
#142938
oklch(27.1% 0.039 241.3)
#4B8BB9 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) | #778BBB | 0.049 |
| Deuteranopia (no green cones) | #6880B8 | 0.041 |
| Tritanopia (no blue cones) | #00969B | 0.074 |
| Achromatopsia (no color) | #858585 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B8BB9
#4B8BB9
oklch(61.4% 0.096 241.9)
- #AE7644
#AE7644
oklch(61.3% 0.097 61.2)
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 #4B8BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.020
- Dusty Blue #5A86AD ΔE 0.023
- Off Blue #5684AE ΔE 0.023
- Steel Blue #4682B4 ΔE 0.027
- Faded Blue #658CBB ΔE 0.028
- Blue NCS #118AB2 ΔE 0.037
- Water Blue #0E87CC ΔE 0.047
- Silver Lake Blue #778DA9 ΔE 0.054
Use #4B8BB9 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.