#43637B
Closest named color: Slate (#516572). oklch(48.5% 0.054 241.6), rgb(67, 99, 123).
Aa
White text reads best on this color (6.34:1).
About this color
#43637B is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.054 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.025 away. White text reads best on it, at 6.34:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.30:1 |
| White text | 6.34:1 |
Values
| HEX | #43637B |
| RGB | rgb(67, 99, 123) |
| HSL | hsl(206, 29%, 37%) |
| OKLCH | oklch(48.5% 0.054 241.6) |
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 #43637B | 6.34:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #43637B | 3.30:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #43637B text on white | 6.34:1 | AA | Lc 81.5 | Fine for body text |
| #43637B text on black | 3.30:1 | AA large text | Lc -20.4 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B3C3D0
oklch(80.9% 0.025 242.4)
-
Step 400
400
#8AA4B9
oklch(70.6% 0.042 242.7)
-
Step 500
500
#6D8EA7
oklch(63.1% 0.053 241.3)
-
Step 600
600
#547893
oklch(55.6% 0.059 241.5)
-
Step 700
700 (this color)
#43637B
oklch(48.5% 0.054 241.6)
-
Step 800
800
#395265
oklch(42.6% 0.044 241.8)
-
Step 900
900
#314453
oklch(37.7% 0.035 242.6)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#43637B 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) | #59637C | 0.029 |
| Deuteranopia (no green cones) | #515D7B | 0.024 |
| Tritanopia (no blue cones) | #2C696B | 0.044 |
| Achromatopsia (no color) | #5F5F5F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43637B
#43637B
oklch(48.5% 0.054 241.6)
- #75583F
#75583F
oklch(48.4% 0.054 61.8)
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 #43637B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- YInMn Blue #415A77 ΔE 0.027
- Denim #3B638C ΔE 0.029
- Dusty Grape #545775 ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.046
- Dusk #4E5481 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.051
Use #43637B 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.