#436FA7
Closest named color: Flat Blue (#3C73A8). oklch(53.6% 0.101 255.2), rgb(67, 111, 167).
Aa
White text reads best on this color (5.15:1).
About this color
#436FA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.101 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.012 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #436FA7 |
| RGB | rgb(67, 111, 167) |
| HSL | hsl(214, 43%, 46%) |
| OKLCH | oklch(53.6% 0.101 255.2) |
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 #436FA7 | 5.15:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #436FA7 | 4.07:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #436FA7 text on white | 5.15:1 | AA | Lc 75.4 | Fine for body text |
| #436FA7 text on black | 4.07:1 | AA large text | Lc -26.4 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ADC3DE
oklch(80.9% 0.045 253.6)
-
Step 400
400
#82A3CE
oklch(70.7% 0.073 255.2)
-
Step 500
500
#628CC1
oklch(63.1% 0.093 254.7)
-
Step 600
600 (this color)
#436FA7
oklch(53.6% 0.101 255.2)
-
Step 700
700
#3A6295
oklch(49.1% 0.094 255.2)
-
Step 800
800
#305079
oklch(42.6% 0.078 255.2)
-
Step 900
900
#2B4361
oklch(37.8% 0.06 254.6)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#436FA7 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) | #5872A9 | 0.027 |
| Deuteranopia (no green cones) | #4A69A6 | 0.017 |
| Tritanopia (no blue cones) | #007C83 | 0.087 |
| Achromatopsia (no color) | #6D6D6D | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436FA7
#436FA7
oklch(53.6% 0.101 255.2)
- #8F641C
#8F641C
oklch(53.6% 0.101 75.5)
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 #436FA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.012
- French Blue #436BAD ΔE 0.016
- Muted Blue #3B719F ΔE 0.017
- Dull Blue #49759C ΔE 0.029
- Mid Blue #276AB3 ΔE 0.036
- Nice Blue #107AB0 ΔE 0.040
- Windows Blue #3778BF ΔE 0.040
- Cerulean #457B9D ΔE 0.043
Use #436FA7 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.