#405366
Closest named color: YInMn Blue (#415A77). oklch(43.4% 0.039 248.8), rgb(64, 83, 102).
Aa
White text reads best on this color (7.93:1).
About this color
#405366 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.039 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.031 away. White text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #405366 |
| RGB | rgb(64, 83, 102) |
| HSL | hsl(210, 23%, 33%) |
| OKLCH | oklch(43.4% 0.039 248.8) |
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 #405366 | 7.93:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #405366 | 2.64:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #405366 text on white | 7.93:1 | AAA | Lc 87.5 | Fine for body text |
| #405366 text on black | 2.64:1 | Fails | Lc -14.6 | Not readable |
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 800.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B6C2CF
oklch(80.9% 0.023 250.3)
-
Step 400
400
#8FA3B7
oklch(70.7% 0.037 248.3)
-
Step 500
500
#748CA5
oklch(63% 0.047 249.6)
-
Step 600
600
#5C7690
oklch(55.5% 0.051 248.8)
-
Step 700
700
#4C637B
oklch(49.1% 0.048 249.9)
-
Step 800
800 (this color)
#405366
oklch(43.4% 0.039 248.8)
-
Step 900
900
#354351
oklch(37.6% 0.03 248.6)
-
Step 950
950
#1F2730
oklch(26.9% 0.02 251.6)
#405366 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) | #4C5367 | 0.017 |
| Deuteranopia (no green cones) | #474F66 | 0.015 |
| Tritanopia (no blue cones) | #345759 | 0.033 |
| Achromatopsia (no color) | #515151 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405366
#405366
oklch(43.4% 0.039 248.8)
- #5F4D39
#5F4D39
oklch(43.3% 0.039 69.4)
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 #405366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.031
- Dusty Grape #545775 ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dusk #4E5481 ΔE 0.051
- Petrol #005F6A ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.056
- Deep Teal #00555A ΔE 0.057
Use #405366 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.