#42747F
Closest named color: Metallic Blue (#4F738E). oklch(52.8% 0.057 213.4), rgb(66, 116, 127).
Aa
White text reads best on this color (5.20:1).
About this color
#42747F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 53%, its chroma 0.057 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.030 away. White text reads best on it, at 5.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #42747F |
| RGB | rgb(66, 116, 127) |
| HSL | hsl(191, 32%, 38%) |
| OKLCH | oklch(52.8% 0.057 213.4) |
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 #42747F | 5.20:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #42747F | 4.03:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #42747F text on white | 5.20:1 | AA | Lc 75.7 | Fine for body text |
| #42747F text on black | 4.03:1 | AA large text | Lc -26.0 | 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 600.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AFC5CB
oklch(80.9% 0.025 215.9)
-
Step 400
400
#84A8B0
oklch(70.8% 0.041 212.8)
-
Step 500
500
#64929D
oklch(63.1% 0.052 214.3)
-
Step 600
600 (this color)
#42747F
oklch(52.8% 0.057 213.4)
-
Step 700
700
#3B6973
oklch(49.2% 0.053 213.2)
-
Step 800
800
#31555D
oklch(42.6% 0.043 213.5)
-
Step 900
900
#2C464C
oklch(37.6% 0.033 213.8)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#42747F 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) | #6C7180 | 0.053 |
| Deuteranopia (no green cones) | #626A7F | 0.047 |
| Tritanopia (no blue cones) | #237977 | 0.033 |
| Achromatopsia (no color) | #6D6D6D | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42747F
#42747F
oklch(52.8% 0.057 213.4)
- #895F56
#895F56
oklch(52.7% 0.057 32.5)
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 #42747F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.030
- Deep Aqua #08787F ΔE 0.034
- Ocean #017B92 ΔE 0.041
- Bluegreen #017A79 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.044
- Slate #516572 ΔE 0.045
- Teal #008080 ΔE 0.046
- Dark Aquamarine #017371 ΔE 0.046
Use #42747F 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.