#405A66
Closest named color: YInMn Blue (#415A77). oklch(45.2% 0.037 228.2), rgb(64, 90, 102).
Aa
White text reads best on this color (7.31:1).
About this color
#405A66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.037 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.029 away. White text reads best on it, at 7.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.87:1 |
| White text | 7.31:1 |
Values
| HEX | #405A66 |
| RGB | rgb(64, 90, 102) |
| HSL | hsl(199, 23%, 33%) |
| OKLCH | oklch(45.2% 0.037 228.2) |
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 #405A66 | 7.31:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #405A66 | 2.87:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #405A66 text on white | 7.31:1 | AAA | Lc 85.4 | Fine for body text |
| #405A66 text on black | 2.87:1 | Fails | Lc -16.7 | 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 800.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D1DBDF
oklch(88.5% 0.012 223.5)
-
Step 300
300
#B3C4CC
oklch(81% 0.022 227.6)
-
Step 400
400
#8BA5B2
oklch(70.6% 0.035 229.5)
-
Step 500
500
#6E8F9F
oklch(63.1% 0.044 229.1)
-
Step 600
600
#55798A
oklch(55.5% 0.048 228.9)
-
Step 700
700
#466675
oklch(49.1% 0.044 228.8)
-
Step 800
800 (this color)
#405A66
oklch(45.2% 0.037 228.2)
-
Step 900
900
#32454E
oklch(37.8% 0.029 228.7)
-
Step 950
950
#1D282E
oklch(26.9% 0.019 232.2)
#405A66 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) | #545967 | 0.028 |
| Deuteranopia (no green cones) | #4E5466 | 0.025 |
| Tritanopia (no blue cones) | #335E5E | 0.026 |
| Achromatopsia (no color) | #565656 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405A66
#405A66
oklch(45.2% 0.037 228.2)
- #675044
#675044
oklch(45.2% 0.036 48.9)
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 #405A66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Dusty Grape #545775 ΔE 0.041
- Petrol #005F6A ΔE 0.044
- Slate #516572 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.053
- Dark Green Blue #1F6357 ΔE 0.054
- Dark Aqua #05696B ΔE 0.056
- Dusk #4E5481 ΔE 0.057
Use #405A66 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.