#42645B
Closest named color: Dark Green Blue (#1F6357). oklch(47.4% 0.042 176), rgb(66, 100, 91).
Aa
White text reads best on this color (6.55:1).
About this color
#42645B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.042 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.035 away. White text reads best on it, at 6.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.20:1 |
| White text | 6.55:1 |
Values
| HEX | #42645B |
| RGB | rgb(66, 100, 91) |
| HSL | hsl(164, 20%, 33%) |
| OKLCH | oklch(47.4% 0.042 176) |
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 #42645B | 6.55:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #42645B | 3.20:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #42645B text on white | 6.55:1 | AA | Lc 82.4 | Fine for body text |
| #42645B text on black | 3.20:1 | AA large text | Lc -19.5 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DCD9
oklch(88.6% 0.012 176.3)
-
Step 300
300
#B4C5C0
oklch(80.9% 0.02 176.3)
-
Step 400
400
#8CA8A0
oklch(70.8% 0.033 176.1)
-
Step 500
500
#6F9288
oklch(63.1% 0.042 175.5)
-
Step 600
600
#577C72
oklch(55.5% 0.045 176)
-
Step 700
700 (this color)
#42645B
oklch(47.4% 0.042 176)
-
Step 800
800
#3A554E
oklch(42.6% 0.035 176.7)
-
Step 900
900
#324641
oklch(37.6% 0.027 177.7)
-
Step 950
950
#1E2926
oklch(26.9% 0.016 176.5)
#42645B 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) | #62605B | 0.045 |
| Deuteranopia (no green cones) | #5C5C5C | 0.042 |
| Tritanopia (no blue cones) | #386561 | 0.013 |
| Achromatopsia (no color) | #5D5D5D | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42645B
#42645B
oklch(47.4% 0.042 176)
- #70525D
#70525D
oklch(47.4% 0.043 355.1)
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 #42645B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.035
- Dark Aqua #05696B ΔE 0.043
- Slate #516572 ΔE 0.044
- Dark Aquamarine #017371 ΔE 0.055
- Petrol #005F6A ΔE 0.056
- Deep Turquoise #017374 ΔE 0.056
- Dim Gray #696969 ΔE 0.063
- YInMn Blue #415A77 ΔE 0.064
Use #42645B 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.