#4A637D
Closest named color: Slate (#516572). oklch(49% 0.052 249.9), rgb(74, 99, 125).
Aa
White text reads best on this color (6.22:1).
About this color
#4A637D is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.052 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.022 away. White text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.37:1 |
| White text | 6.22:1 |
Values
| HEX | #4A637D |
| RGB | rgb(74, 99, 125) |
| HSL | hsl(211, 26%, 39%) |
| OKLCH | oklch(49% 0.052 249.9) |
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 #4A637D | 6.22:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #4A637D | 3.37:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #4A637D text on white | 6.22:1 | AA | Lc 81.0 | Fine for body text |
| #4A637D text on black | 3.37:1 | AA large text | Lc -20.9 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8EA3B9
oklch(70.7% 0.04 249.6)
-
Step 500
500
#728CA8
oklch(63% 0.052 250.5)
-
Step 600
600
#5A7693
oklch(55.5% 0.056 249.7)
-
Step 700
700 (this color)
#4A637D
oklch(49% 0.052 249.9)
-
Step 800
800
#3D5166
oklch(42.7% 0.043 250.1)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#4A637D 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) | #59647E | 0.021 |
| Deuteranopia (no green cones) | #535E7C | 0.018 |
| Tritanopia (no blue cones) | #38696C | 0.044 |
| Achromatopsia (no color) | #616161 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A637D
#4A637D
oklch(49% 0.052 249.9)
- #745C40
#745C40
oklch(49.2% 0.052 70.5)
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 #4A637D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.022
- Denim #3B638C ΔE 0.029
- YInMn Blue #415A77 ΔE 0.031
- Dusty Grape #545775 ΔE 0.035
- Dusky Blue #475F94 ΔE 0.043
- Dusk #4E5481 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.050
- Metallic Blue #4F738E ΔE 0.050
Use #4A637D 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.