#4B818F
Closest named color: Grey Blue (#647D8E). oklch(57.1% 0.061 216.3), rgb(75, 129, 143).
Aa
Black text reads best on this color (4.83:1).
About this color
#4B818F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.061 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.029 away. Black text reads best on it, at 4.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #4B818F |
| RGB | rgb(75, 129, 143) |
| HSL | hsl(192, 31%, 43%) |
| OKLCH | oklch(57.1% 0.061 216.3) |
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 #4B818F | 4.34:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #4B818F | 4.83:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #4B818F text on white | 4.34:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #4B818F text on black | 4.83:1 | AA | Lc -31.7 | 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 600.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#AEC5CC
oklch(80.8% 0.027 218)
-
Step 400
400
#82A8B2
oklch(70.7% 0.044 215.6)
-
Step 500
500
#61929F
oklch(63% 0.056 216.3)
-
Step 600
600 (this color)
#4B818F
oklch(57.1% 0.061 216.3)
-
Step 700
700
#386975
oklch(49.1% 0.056 215.5)
-
Step 800
800
#2F5660
oklch(42.9% 0.047 216.2)
-
Step 900
900
#2A474E
oklch(37.8% 0.037 214.7)
-
Step 950
950
#19292E
oklch(26.9% 0.023 219.4)
#4B818F 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) | #777E90 | 0.054 |
| Deuteranopia (no green cones) | #6D768F | 0.049 |
| Tritanopia (no blue cones) | #298685 | 0.037 |
| Achromatopsia (no color) | #797979 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B818F
#4B818F
oklch(57.1% 0.061 216.3)
- #986B5F
#986B5F
oklch(57.1% 0.061 35.5)
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 #4B818F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.029
- Stormy Blue #507B9C ΔE 0.032
- Cerulean #457B9D ΔE 0.033
- Battleship Grey #6B7C85 ΔE 0.038
- Teal Blue #01889F ΔE 0.041
- Metallic Blue #4F738E ΔE 0.041
- Steel Grey #6F828A ΔE 0.043
- Slate Gray #708090 ΔE 0.044
Use #4B818F 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.