#436D89
Closest named color: Metallic Blue (#4F738E). oklch(51.6% 0.065 239), rgb(67, 109, 137).
Aa
White text reads best on this color (5.54:1).
About this color
#436D89 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.065 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.024 away. White text reads best on it, at 5.54:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #436D89 |
| RGB | rgb(67, 109, 137) |
| HSL | hsl(204, 34%, 40%) |
| OKLCH | oklch(51.6% 0.065 239) |
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 #436D89 | 5.54:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #436D89 | 3.78:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #436D89 text on white | 5.54:1 | AA | Lc 77.6 | Fine for body text |
| #436D89 text on black | 3.78:1 | AA large text | Lc -24.2 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D3
oklch(80.9% 0.031 238.9)
-
Step 400
400
#84A6BD
oklch(70.8% 0.05 238)
-
Step 500
500
#658FAC
oklch(63% 0.064 239.2)
-
Step 600
600
#4B7998
oklch(55.6% 0.07 239.2)
-
Step 700
700 (this color)
#436D89
oklch(51.6% 0.065 239)
-
Step 800
800
#325369
oklch(42.7% 0.053 238.9)
-
Step 900
900
#2C4555
oklch(37.7% 0.041 237.4)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#436D89 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) | #616D8A | 0.038 |
| Deuteranopia (no green cones) | #576589 | 0.032 |
| Tritanopia (no blue cones) | #1F7476 | 0.052 |
| Achromatopsia (no color) | #686868 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436D89
#436D89
oklch(51.6% 0.065 239)
- #845F41
#845F41
oklch(51.7% 0.065 59.7)
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 #436D89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.024
- Muted Blue #3B719F ΔE 0.034
- Denim #3B638C ΔE 0.034
- Dull Blue #49759C ΔE 0.035
- Slate #516572 ΔE 0.039
- Sea Blue #047495 ΔE 0.039
- Ocean Blue #03719C ΔE 0.043
- Cerulean #457B9D ΔE 0.046
Use #436D89 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.