#436E89
Closest named color: Metallic Blue (#4F738E). oklch(51.8% 0.064 237.4), rgb(67, 110, 137).
Aa
White text reads best on this color (5.48:1).
About this color
#436E89 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.064 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.022 away. White text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.83:1 |
| White text | 5.48:1 |
Values
| HEX | #436E89 |
| RGB | rgb(67, 110, 137) |
| HSL | hsl(203, 34%, 40%) |
| OKLCH | oklch(51.8% 0.064 237.4) |
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 #436E89 | 5.48:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #436E89 | 3.83:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #436E89 text on white | 5.48:1 | AA | Lc 77.3 | Fine for body text |
| #436E89 text on black | 3.83:1 | AA large text | Lc -24.5 | 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
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AFC4D3
oklch(80.9% 0.031 238.9)
-
Step 400
400
#84A6BC
oklch(70.8% 0.049 236.8)
-
Step 500
500
#6490AC
oklch(63.2% 0.064 237.1)
-
Step 600
600
#4A7997
oklch(55.5% 0.069 237.8)
-
Step 700
700 (this color)
#436E89
oklch(51.8% 0.064 237.4)
-
Step 800
800
#315369
oklch(42.6% 0.054 238.2)
-
Step 900
900
#2C4555
oklch(37.7% 0.041 237.4)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#436E89 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) | #626D8A | 0.039 |
| Deuteranopia (no green cones) | #586689 | 0.033 |
| Tritanopia (no blue cones) | #1F7577 | 0.051 |
| Achromatopsia (no color) | #696969 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436E89
#436E89
oklch(51.8% 0.064 237.4)
- #855F43
#855F43
oklch(51.8% 0.064 57.1)
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 #436E89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.022
- Muted Blue #3B719F ΔE 0.034
- Dull Blue #49759C ΔE 0.034
- Denim #3B638C ΔE 0.037
- Sea Blue #047495 ΔE 0.038
- Slate #516572 ΔE 0.040
- Ocean Blue #03719C ΔE 0.044
- Cerulean #457B9D ΔE 0.044
Use #436E89 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.