#436FA3
Closest named color: Muted Blue (#3B719F). oklch(53.4% 0.096 253.6), rgb(67, 111, 163).
Aa
White text reads best on this color (5.19:1).
About this color
#436FA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.096 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.012 away. White text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #436FA3 |
| RGB | rgb(67, 111, 163) |
| HSL | hsl(213, 42%, 45%) |
| OKLCH | oklch(53.4% 0.096 253.6) |
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 #436FA3 | 5.19:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #436FA3 | 4.04:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #436FA3 text on white | 5.19:1 | AA | Lc 75.6 | Fine for body text |
| #436FA3 text on black | 4.04:1 | AA large text | Lc -26.1 | 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 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CFDAE9
oklch(88.5% 0.024 256.1)
-
Step 300
300
#AEC3DC
oklch(80.9% 0.042 252.9)
-
Step 400
400
#83A3CB
oklch(70.6% 0.069 254.3)
-
Step 500
500
#638CBE
oklch(63% 0.089 253.9)
-
Step 600
600 (this color)
#436FA3
oklch(53.4% 0.096 253.6)
-
Step 700
700
#3B6392
oklch(49.2% 0.088 253.5)
-
Step 800
800
#315176
oklch(42.8% 0.073 253)
-
Step 900
900
#2B4360
oklch(37.7% 0.058 253.8)
-
Step 950
950
#1A2738
oklch(26.9% 0.037 255.4)
#436FA3 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) | #5972A5 | 0.028 |
| Deuteranopia (no green cones) | #4D69A2 | 0.019 |
| Tritanopia (no blue cones) | #007B82 | 0.081 |
| Achromatopsia (no color) | #6D6D6D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436FA3
#436FA3
oklch(53.4% 0.096 253.6)
- #8E6324
#8E6324
oklch(53.3% 0.096 73)
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 #436FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.012
- Flat Blue #3C73A8 ΔE 0.013
- French Blue #436BAD ΔE 0.022
- Dull Blue #49759C ΔE 0.025
- Cerulean #457B9D ΔE 0.039
- Mid Blue #276AB3 ΔE 0.040
- Ocean Blue #03719C ΔE 0.040
- Metallic Blue #4F738E ΔE 0.040
Use #436FA3 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.