#4F839B
Closest named color: Stormy Blue (#507B9C). oklch(58.3% 0.067 229.2), rgb(79, 131, 155).
Aa
Black text reads best on this color (5.05:1).
About this color
#4F839B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 58%, its chroma 0.067 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.024 away. Black text reads best on it, at 5.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #4F839B |
| RGB | rgb(79, 131, 155) |
| HSL | hsl(199, 32%, 46%) |
| OKLCH | oklch(58.3% 0.067 229.2) |
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 #4F839B | 4.15:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #4F839B | 5.05:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #4F839B text on white | 4.15:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #4F839B text on black | 5.05:1 | AA | Lc -33.1 | 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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDBE2
oklch(88.4% 0.017 230.9)
-
Step 300
300
#AEC5D0
oklch(81% 0.029 228.2)
-
Step 400
400
#82A7B9
oklch(70.7% 0.048 229.2)
-
Step 500
500
#6191A7
oklch(63.1% 0.061 228.5)
-
Step 600
600 (this color)
#4F839B
oklch(58.3% 0.067 229.2)
-
Step 700
700
#38687D
oklch(49.2% 0.062 228.4)
-
Step 800
800
#2F5466
oklch(42.6% 0.052 230.8)
-
Step 900
900
#2A4653
oklch(37.8% 0.04 229.1)
-
Step 950
950
#192930
oklch(27% 0.025 227.2)
#4F839B 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) | #77819C | 0.049 |
| Deuteranopia (no green cones) | #6C799B | 0.043 |
| Tritanopia (no blue cones) | #298A8B | 0.048 |
| Achromatopsia (no color) | #7C7C7C | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F839B
#4F839B
oklch(58.3% 0.067 229.2)
- #9C7058
#9C7058
oklch(58.4% 0.066 49.6)
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 #4F839B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.024
- Cerulean #457B9D ΔE 0.028
- Grey Blue #647D8E ΔE 0.029
- Off Blue #5684AE ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.031
- Slate Gray #708090 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.040
- Teal Blue #01889F ΔE 0.041
Use #4F839B 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.