#43556B
Closest named color: YInMn Blue (#415A77). oklch(44.3% 0.043 253.7), rgb(67, 85, 107).
Aa
White text reads best on this color (7.63:1).
About this color
#43556B is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.043 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 7.63:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.75:1 |
| White text | 7.63:1 |
Values
| HEX | #43556B |
| RGB | rgb(67, 85, 107) |
| HSL | hsl(213, 23%, 34%) |
| OKLCH | oklch(44.3% 0.043 253.7) |
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 #43556B | 7.63:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #43556B | 2.75:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #43556B text on white | 7.63:1 | AAA | Lc 86.5 | Fine for body text |
| #43556B text on black | 2.75:1 | Fails | Lc -15.6 | 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 800.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B6C2D1
oklch(80.9% 0.025 254)
-
Step 400
400
#90A2BA
oklch(70.6% 0.041 255.7)
-
Step 500
500
#748CA8
oklch(63.2% 0.051 252.5)
-
Step 600
600
#5D7594
oklch(55.6% 0.056 255)
-
Step 700
700
#4C637E
oklch(49.2% 0.052 252.8)
-
Step 800
800 (this color)
#43556B
oklch(44.3% 0.043 253.7)
-
Step 900
900
#354353
oklch(37.7% 0.033 252.1)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#43556B 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) | #4D566C | 0.015 |
| Deuteranopia (no green cones) | #48526B | 0.011 |
| Tritanopia (no blue cones) | #365A5C | 0.038 |
| Achromatopsia (no color) | #535353 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43556B
#43556B
oklch(44.3% 0.043 253.7)
- #625039
#625039
oklch(44.3% 0.043 73.2)
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 #43556B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Dusty Grape #545775 ΔE 0.031
- Dusk #4E5481 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.050
- Slate #516572 ΔE 0.054
- Petrol #005F6A ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.056
- Denim #3B638C ΔE 0.059
Use #43556B 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.