#436C7B
Closest named color: Slate (#516572). oklch(50.7% 0.052 223.2), rgb(67, 108, 123).
Aa
White text reads best on this color (5.72:1).
About this color
#436C7B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.052 and its hue 223°. 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 5.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #436C7B |
| RGB | rgb(67, 108, 123) |
| HSL | hsl(196, 29%, 37%) |
| OKLCH | oklch(50.7% 0.052 223.2) |
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 #436C7B | 5.72:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #436C7B | 3.66:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #436C7B text on white | 5.72:1 | AA | Lc 78.5 | Fine for body text |
| #436C7B text on black | 3.66:1 | AA large text | Lc -23.2 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBE0
oklch(88.5% 0.014 226.6)
-
Step 300
300
#B0C5CD
oklch(81% 0.026 222.7)
-
Step 400
400
#86A7B3
oklch(70.8% 0.04 222)
-
Step 500
500
#6791A0
oklch(63.1% 0.051 222.1)
-
Step 600
600
#4E7B8B
oklch(55.7% 0.055 222.5)
-
Step 700
700 (this color)
#436C7B
oklch(50.7% 0.052 223.2)
-
Step 800
800
#345460
oklch(42.6% 0.042 223.7)
-
Step 900
900
#2E464F
oklch(37.8% 0.033 223.4)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#436C7B 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) | #636A7C | 0.041 |
| Deuteranopia (no green cones) | #5B637B | 0.039 |
| Tritanopia (no blue cones) | #2A7171 | 0.034 |
| Achromatopsia (no color) | #666666 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436C7B
#436C7B
oklch(50.7% 0.052 223.2)
- #7F5C4D
#7F5C4D
oklch(50.7% 0.052 44.2)
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 #436C7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- Metallic Blue #4F738E ΔE 0.037
- Denim #3B638C ΔE 0.045
- Deep Aqua #08787F ΔE 0.046
- Deep Turquoise #017374 ΔE 0.046
- Dark Aquamarine #017371 ΔE 0.049
- Sea Blue #047495 ΔE 0.050
- Dark Aqua #05696B ΔE 0.053
Use #436C7B 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.