#40574A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.4% 0.035 159.7), rgb(64, 87, 74).
Aa
White text reads best on this color (7.83:1).
About this color
#40574A is a dark, muted green. In OKLCH its lightness is 43%, its chroma 0.035 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.038 away. White text reads best on it, at 7.83:1.
| Hue family | Greens |
| Lightness | dark (43%) |
| Chroma | muted (0.035) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #40574A |
| RGB | rgb(64, 87, 74) |
| HSL | hsl(146, 15%, 30%) |
| OKLCH | oklch(43.4% 0.035 159.7) |
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 #40574A | 7.83:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #40574A | 2.68:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #40574A text on white | 7.83:1 | AAA | Lc 87.2 | Fine for body text |
| #40574A text on black | 2.68:1 | Fails | Lc -14.9 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D3DBD6
oklch(88.4% 0.011 158.8)
-
Step 300
300
#B6C5BC
oklch(80.9% 0.021 159.6)
-
Step 400
400
#90A799
oklch(70.7% 0.033 158.7)
-
Step 500
500
#749281
oklch(63.2% 0.042 160.1)
-
Step 600
600
#5C7C6A
oklch(55.6% 0.046 159.8)
-
Step 700
700
#4C6858
oklch(49% 0.042 159.3)
-
Step 800
800 (this color)
#40574A
oklch(43.4% 0.035 159.7)
-
Step 900
900
#35463C
oklch(37.6% 0.028 158.9)
-
Step 950
950
#1F2923
oklch(26.9% 0.018 158.6)
#40574A 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) | #565449 | 0.033 |
| Deuteranopia (no green cones) | #52514B | 0.032 |
| Tritanopia (no blue cones) | #3C5753 | 0.015 |
| Achromatopsia (no color) | #525252 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40574A
#40574A
oklch(43.4% 0.035 159.7)
- #5E4957
#5E4957
oklch(43.2% 0.036 338.8)
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 #40574A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Green Blue #1F6357 ΔE 0.044
- Pine #2B5D34 ΔE 0.052
- Deep Teal #00555A ΔE 0.055
- Dark Blue Green #005249 ΔE 0.057
- Petrol #005F6A ΔE 0.060
- Spruce #0A5F38 ΔE 0.064
- Dark Teal #014D4E ΔE 0.067
Use #40574A 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.