#435C59
Closest named color: Dark Green Blue (#1F6357). oklch(45.4% 0.03 187), rgb(67, 92, 89).
Aa
White text reads best on this color (7.20:1).
About this color
#435C59 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.030 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.040 away. White text reads best on it, at 7.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #435C59 |
| RGB | rgb(67, 92, 89) |
| HSL | hsl(173, 16%, 31%) |
| OKLCH | oklch(45.4% 0.03 187) |
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 #435C59 | 7.20:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #435C59 | 2.91:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #435C59 text on white | 7.20:1 | AAA | Lc 85.0 | Fine for body text |
| #435C59 text on black | 2.91:1 | Fails | Lc -17.0 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DBDA
oklch(88.4% 0.01 189)
-
Step 300
300
#B4C5C2
oklch(81% 0.019 184.1)
-
Step 400
400
#8DA7A3
oklch(70.7% 0.029 185.2)
-
Step 500
500
#71918D
oklch(63.1% 0.036 186.9)
-
Step 600
600
#597B77
oklch(55.6% 0.039 187.1)
-
Step 700
700
#496864
oklch(49.2% 0.037 186.1)
-
Step 800
800 (this color)
#435C59
oklch(45.4% 0.03 187)
-
Step 900
900
#334644
oklch(37.7% 0.024 188.2)
-
Step 950
950
#1E2928
oklch(27% 0.015 189.4)
#435C59 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) | #595959 | 0.032 |
| Deuteranopia (no green cones) | #555659 | 0.030 |
| Tritanopia (no blue cones) | #3B5D5B | 0.010 |
| Achromatopsia (no color) | #575757 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #435C59
#435C59
oklch(45.4% 0.03 187)
- #664F53
#664F53
oklch(45.3% 0.031 6.7)
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 #435C59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.040
- Slate #516572 ΔE 0.049
- Petrol #005F6A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.051
- YInMn Blue #415A77 ΔE 0.052
- Dark Aqua #05696B ΔE 0.053
- Dusty Grape #545775 ΔE 0.060
- Deep Teal #00555A ΔE 0.060
Use #435C59 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.