#425C5B
Closest named color: Dark Green Blue (#1F6357). oklch(45.4% 0.031 193.1), rgb(66, 92, 91).
Aa
White text reads best on this color (7.20:1).
About this color
#425C5B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.031 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.041 away. White text reads best on it, at 7.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #425C5B |
| RGB | rgb(66, 92, 91) |
| HSL | hsl(178, 16%, 31%) |
| OKLCH | oklch(45.4% 0.031 193.1) |
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 #425C5B | 7.20:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #425C5B | 2.91:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #425C5B text on white | 7.20:1 | AAA | Lc 85.0 | Fine for body text |
| #425C5B text on black | 2.91:1 | Fails | Lc -17.0 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDB
oklch(88.5% 0.01 197)
-
Step 300
300
#B4C5C4
oklch(81% 0.019 192.5)
-
Step 400
400
#8CA7A5
oklch(70.7% 0.03 191)
-
Step 500
500
#709190
oklch(63.1% 0.037 193.9)
-
Step 600
600
#577B7A
oklch(55.6% 0.041 193.9)
-
Step 700
700
#476867
oklch(49.2% 0.038 193.6)
-
Step 800
800 (this color)
#425C5B
oklch(45.4% 0.031 193.1)
-
Step 900
900
#334645
oklch(37.8% 0.024 192.1)
-
Step 950
950
#1E2928
oklch(27% 0.015 189.4)
#425C5B 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) | #59595B | 0.033 |
| Deuteranopia (no green cones) | #54565B | 0.030 |
| Tritanopia (no blue cones) | #395E5C | 0.011 |
| Achromatopsia (no color) | #575757 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425C5B
#425C5B
oklch(45.4% 0.031 193.1)
- #664F51
#664F51
oklch(45.2% 0.031 12.5)
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 #425C5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.041
- Slate #516572 ΔE 0.048
- Petrol #005F6A ΔE 0.048
- YInMn Blue #415A77 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.051
- Dark Aqua #05696B ΔE 0.052
- Dusty Grape #545775 ΔE 0.058
- Deep Teal #00555A ΔE 0.059
Use #425C5B 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.