#436D7B
Closest named color: Slate (#516572). oklch(51% 0.052 221.2), rgb(67, 109, 123).
Aa
White text reads best on this color (5.65:1).
About this color
#436D7B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.052 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.027 away. White text reads best on it, at 5.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #436D7B |
| RGB | rgb(67, 109, 123) |
| HSL | hsl(195, 29%, 37%) |
| OKLCH | oklch(51% 0.052 221.2) |
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 #436D7B | 5.65:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #436D7B | 3.71:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #436D7B text on white | 5.65:1 | AA | Lc 78.2 | Fine for body text |
| #436D7B text on black | 3.71:1 | AA large text | Lc -23.6 | 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 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
#B0C5CC
oklch(81% 0.025 219.8)
-
Step 400
400
#86A7B2
oklch(70.7% 0.04 220.1)
-
Step 500
500
#6791A0
oklch(63.1% 0.051 222.1)
-
Step 600
600
#4D7B8A
oklch(55.6% 0.055 220.6)
-
Step 700
700 (this color)
#436D7B
oklch(51% 0.052 221.2)
-
Step 800
800
#335560
oklch(42.8% 0.043 220.5)
-
Step 900
900
#2D464E
oklch(37.7% 0.034 219.9)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#436D7B 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) | #656B7C | 0.044 |
| Deuteranopia (no green cones) | #5C647B | 0.039 |
| Tritanopia (no blue cones) | #2A7271 | 0.034 |
| Achromatopsia (no color) | #676767 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436D7B
#436D7B
oklch(51% 0.052 221.2)
- #805C4F
#805C4F
oklch(50.9% 0.052 40.7)
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 #436D7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.027
- Metallic Blue #4F738E ΔE 0.036
- Deep Aqua #08787F ΔE 0.044
- Deep Turquoise #017374 ΔE 0.045
- Dark Aquamarine #017371 ΔE 0.048
- Denim #3B638C ΔE 0.048
- Sea Blue #047495 ΔE 0.049
- Bluegreen #017A79 ΔE 0.052
Use #436D7B 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.