#435B66
Closest named color: YInMn Blue (#415A77). oklch(45.6% 0.034 227.8), rgb(67, 91, 102).
Aa
White text reads best on this color (7.17:1).
About this color
#435B66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.034 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.030 away. White text reads best on it, at 7.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.92:1 |
| White text | 7.17:1 |
Values
| HEX | #435B66 |
| RGB | rgb(67, 91, 102) |
| HSL | hsl(199, 21%, 33%) |
| OKLCH | oklch(45.6% 0.034 227.8) |
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 #435B66 | 7.17:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #435B66 | 2.92:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #435B66 text on white | 7.17:1 | AAA | Lc 84.9 | Fine for body text |
| #435B66 text on black | 2.92:1 | Fails | Lc -17.1 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDF
oklch(88.6% 0.011 226)
-
Step 300
300
#B4C3CB
oklch(80.8% 0.02 230.8)
-
Step 400
400
#8DA5B0
oklch(70.7% 0.031 227.2)
-
Step 500
500
#708F9D
oklch(63.1% 0.041 227.2)
-
Step 600
600
#587988
oklch(55.7% 0.044 227.8)
-
Step 700
700
#486673
oklch(49.2% 0.041 226.7)
-
Step 800
800 (this color)
#435B66
oklch(45.6% 0.034 227.8)
-
Step 900
900
#33454D
oklch(37.8% 0.027 227)
-
Step 950
950
#1E282D
oklch(27% 0.017 229.8)
#435B66 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) | #555A67 | 0.026 |
| Deuteranopia (no green cones) | #505666 | 0.023 |
| Tritanopia (no blue cones) | #375E5E | 0.024 |
| Achromatopsia (no color) | #575757 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #435B66
#435B66
oklch(45.6% 0.034 227.8)
- #675247
#675247
oklch(45.7% 0.033 49.1)
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 #435B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.030
- Slate #516572 ΔE 0.040
- Dusty Grape #545775 ΔE 0.040
- Petrol #005F6A ΔE 0.047
- Dark Green Blue #1F6357 ΔE 0.054
- Dark Aqua #05696B ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.057
- Dusk #4E5481 ΔE 0.058
Use #435B66 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.