#43577C
Closest named color: YInMn Blue (#415A77). oklch(45.7% 0.066 262.2), rgb(67, 87, 124).
Aa
White text reads best on this color (7.25:1).
About this color
#43577C is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.066 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.014 away. White text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #43577C |
| RGB | rgb(67, 87, 124) |
| HSL | hsl(219, 30%, 37%) |
| OKLCH | oklch(45.7% 0.066 262.2) |
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 #43577C | 7.25:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #43577C | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #43577C text on white | 7.25:1 | AAA | Lc 85.2 | Fine for body text |
| #43577C text on black | 2.89:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B3C1DA
oklch(80.8% 0.039 262.1)
-
Step 400
400
#8CA1C8
oklch(70.7% 0.062 262.7)
-
Step 500
500
#708ABA
oklch(63.2% 0.079 262.3)
-
Step 600
600
#5873A6
oklch(55.6% 0.086 262.5)
-
Step 700
700
#48608E
oklch(49% 0.08 262.7)
-
Step 800
800 (this color)
#43577C
oklch(45.7% 0.066 262.2)
-
Step 900
900
#33425D
oklch(37.8% 0.05 261.8)
-
Step 950
950
#1E2636
oklch(26.9% 0.032 263.8)
#43577C 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) | #4A5A7E | 0.014 |
| Deuteranopia (no green cones) | #43547B | 0.009 |
| Tritanopia (no blue cones) | #2E5F64 | 0.059 |
| Achromatopsia (no color) | #575757 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43577C
#43577C
oklch(45.7% 0.066 262.2)
- #695329
#695329
oklch(45.5% 0.066 82)
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 #43577C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.014
- Dusk #4E5481 ΔE 0.020
- Dusty Grape #545775 ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.036
- Twilight #4E518B ΔE 0.037
- Denim #3B638C ΔE 0.038
- Dusky Blue #475F94 ΔE 0.042
Use #43577C 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.