#436F88
Closest named color: Metallic Blue (#4F738E). oklch(52% 0.063 234.7), rgb(67, 111, 136).
Aa
White text reads best on this color (5.42:1).
About this color
#436F88 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.063 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.021 away. White text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.86:1 |
| White text | 5.42:1 |
Values
| HEX | #436F88 |
| RGB | rgb(67, 111, 136) |
| HSL | hsl(202, 34%, 40%) |
| OKLCH | oklch(52% 0.063 234.7) |
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 #436F88 | 5.42:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #436F88 | 3.86:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #436F88 text on white | 5.42:1 | AA | Lc 77.0 | Fine for body text |
| #436F88 text on black | 3.86:1 | AA large text | Lc -24.8 | 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
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D2
oklch(80.8% 0.031 235.7)
-
Step 400
400
#84A6BB
oklch(70.7% 0.048 235.5)
-
Step 500
500
#6490AA
oklch(63.1% 0.062 235)
-
Step 600
600
#4A7A95
oklch(55.6% 0.067 234.4)
-
Step 700
700 (this color)
#436F88
oklch(52% 0.063 234.7)
-
Step 800
800
#315467
oklch(42.8% 0.051 233.5)
-
Step 900
900
#2C4554
oklch(37.7% 0.04 235.6)
-
Step 950
950
#1A2931
oklch(27.1% 0.025 232.2)
#436F88 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) | #636E89 | 0.040 |
| Deuteranopia (no green cones) | #5A6788 | 0.035 |
| Tritanopia (no blue cones) | #207677 | 0.049 |
| Achromatopsia (no color) | #6A6A6A | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436F88
#436F88
oklch(52% 0.063 234.7)
- #855F46
#855F46
oklch(51.9% 0.062 54.2)
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 #436F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.021
- Dull Blue #49759C ΔE 0.034
- Muted Blue #3B719F ΔE 0.036
- Sea Blue #047495 ΔE 0.038
- Slate #516572 ΔE 0.040
- Denim #3B638C ΔE 0.041
- Cerulean #457B9D ΔE 0.043
- Ocean #017B92 ΔE 0.044
Use #436F88 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.