#40665F
Closest named color: Dark Green Blue (#1F6357). oklch(48% 0.045 181.4), rgb(64, 102, 95).
Aa
White text reads best on this color (6.39:1).
About this color
#40665F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.045 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.036 away. White text reads best on it, at 6.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #40665F |
| RGB | rgb(64, 102, 95) |
| HSL | hsl(169, 23%, 33%) |
| OKLCH | oklch(48% 0.045 181.4) |
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 #40665F | 6.39:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #40665F | 3.28:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #40665F text on white | 6.39:1 | AA | Lc 81.7 | Fine for body text |
| #40665F text on black | 3.28:1 | AA large text | Lc -20.2 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D1DCD9
oklch(88.5% 0.013 178)
-
Step 300
300
#B2C5C1
oklch(80.8% 0.021 181.7)
-
Step 400
400
#8AA8A2
oklch(70.7% 0.034 181.8)
-
Step 500
500
#6C938B
oklch(63.2% 0.045 180.7)
-
Step 600
600
#537D75
oklch(55.6% 0.048 181.2)
-
Step 700
700 (this color)
#40665F
oklch(48% 0.045 181.4)
-
Step 800
800
#385650
oklch(42.8% 0.037 180.5)
-
Step 900
900
#304742
oklch(37.7% 0.03 179.6)
-
Step 950
950
#1D2927
oklch(26.9% 0.017 183.7)
#40665F 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) | #63625F | 0.048 |
| Deuteranopia (no green cones) | #5C5D60 | 0.045 |
| Tritanopia (no blue cones) | #336764 | 0.014 |
| Achromatopsia (no color) | #5F5F5F | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40665F
#40665F
oklch(48% 0.045 181.4)
- #73535C
#73535C
oklch(47.9% 0.045 0.4)
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 #40665F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.036
- Dark Aqua #05696B ΔE 0.039
- Slate #516572 ΔE 0.041
- Dark Aquamarine #017371 ΔE 0.048
- Deep Turquoise #017374 ΔE 0.050
- Petrol #005F6A ΔE 0.055
- Dim Gray #696969 ΔE 0.061
- YInMn Blue #415A77 ΔE 0.063
Use #40665F 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.