#425E5B
Closest named color: Dark Green Blue (#1F6357). oklch(45.9% 0.034 187.8), rgb(66, 94, 91).
Aa
White text reads best on this color (7.03:1).
About this color
#425E5B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.034 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.038 away. White text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #425E5B |
| RGB | rgb(66, 94, 91) |
| HSL | hsl(174, 18%, 31%) |
| OKLCH | oklch(45.9% 0.034 187.8) |
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 #425E5B | 7.03:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #425E5B | 2.98:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #425E5B text on white | 7.03:1 | AAA | Lc 84.4 | Fine for body text |
| #425E5B text on black | 2.98:1 | Fails | Lc -17.6 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DCDA
oklch(88.6% 0.011 182.8)
-
Step 300
300
#B3C5C3
oklch(80.9% 0.02 188.7)
-
Step 400
400
#8BA7A4
oklch(70.6% 0.031 188.5)
-
Step 500
500
#6E928E
oklch(63.2% 0.04 187.7)
-
Step 600
600
#557C78
oklch(55.6% 0.044 188)
-
Step 700
700
#456865
oklch(49% 0.041 189.2)
-
Step 800
800 (this color)
#425E5B
oklch(45.9% 0.034 187.8)
-
Step 900
900
#324644
oklch(37.7% 0.025 188.5)
-
Step 950
950
#1D2928
oklch(26.9% 0.017 189.9)
#425E5B 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) | #5B5B5B | 0.036 |
| Deuteranopia (no green cones) | #56575B | 0.034 |
| Tritanopia (no blue cones) | #395F5D | 0.010 |
| Achromatopsia (no color) | #595959 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425E5B
#425E5B
oklch(45.9% 0.034 187.8)
- #695054
#695054
oklch(45.9% 0.034 7.8)
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 #425E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.038
- Slate #516572 ΔE 0.046
- Dark Aqua #05696B ΔE 0.049
- Petrol #005F6A ΔE 0.049
- YInMn Blue #415A77 ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dusty Grape #545775 ΔE 0.061
- Deep Teal #00555A ΔE 0.062
Use #425E5B 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.