#4F647B
Closest named color: Slate (#516572). oklch(49.5% 0.045 251), rgb(79, 100, 123).
Aa
White text reads best on this color (6.10:1).
About this color
#4F647B is a medium-dark, muted blue. In OKLCH its lightness is 50%, its chroma 0.045 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.016 away. White text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #4F647B |
| RGB | rgb(79, 100, 123) |
| HSL | hsl(211, 22%, 40%) |
| OKLCH | oklch(49.5% 0.045 251) |
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 #4F647B | 6.10:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #4F647B | 3.44:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #4F647B text on white | 6.10:1 | AA | Lc 80.5 | Fine for body text |
| #4F647B text on black | 3.44:1 | AA large text | Lc -21.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B7C2CF
oklch(81% 0.022 252.5)
-
Step 400
400
#91A3B6
oklch(70.8% 0.034 249.7)
-
Step 500
500
#768CA4
oklch(63.1% 0.044 250.8)
-
Step 600
600
#5E768F
oklch(55.6% 0.048 249.7)
-
Step 700
700 (this color)
#4F647B
oklch(49.5% 0.045 251)
-
Step 800
800
#405163
oklch(42.8% 0.037 250.2)
-
Step 900
900
#364351
oklch(37.7% 0.029 250.5)
-
Step 950
950
#20272F
oklch(26.9% 0.018 251.9)
#4F647B 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) | #5B657C | 0.017 |
| Deuteranopia (no green cones) | #56607B | 0.015 |
| Tritanopia (no blue cones) | #41696C | 0.038 |
| Achromatopsia (no color) | #626262 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F647B
#4F647B
oklch(49.5% 0.045 251)
- #725E46
#725E46
oklch(49.5% 0.044 71.6)
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 #4F647B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.016
- Denim #3B638C ΔE 0.036
- YInMn Blue #415A77 ΔE 0.037
- Dusty Grape #545775 ΔE 0.037
- Metallic Blue #4F738E ΔE 0.047
- Dusky Blue #475F94 ΔE 0.048
- Dim Gray #696969 ΔE 0.052
- Dusk #4E5481 ΔE 0.052
Use #4F647B 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.