#42717C
Closest named color: Metallic Blue (#4F738E). oklch(51.9% 0.054 214.4), rgb(66, 113, 124).
Aa
White text reads best on this color (5.40:1).
About this color
#42717C is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.054 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.034 away. White text reads best on it, at 5.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #42717C |
| RGB | rgb(66, 113, 124) |
| HSL | hsl(191, 31%, 37%) |
| OKLCH | oklch(51.9% 0.054 214.4) |
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 #42717C | 5.40:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #42717C | 3.88:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #42717C text on white | 5.40:1 | AA | Lc 76.9 | Fine for body text |
| #42717C text on black | 3.88:1 | AA large text | Lc -24.9 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AEC5CB
oklch(80.8% 0.026 215.2)
-
Step 400
400
#83A8B1
oklch(70.7% 0.042 214.2)
-
Step 500
500
#63929D
oklch(63% 0.053 214)
-
Step 600
600
#497C88
oklch(55.5% 0.058 214.5)
-
Step 700
700 (this color)
#42717C
oklch(51.9% 0.054 214.4)
-
Step 800
800
#30555E
oklch(42.6% 0.045 215.1)
-
Step 900
900
#2B474D
oklch(37.8% 0.035 212.7)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#42717C 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) | #696E7D | 0.050 |
| Deuteranopia (no green cones) | #60677C | 0.045 |
| Tritanopia (no blue cones) | #267574 | 0.031 |
| Achromatopsia (no color) | #6A6A6A | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42717C
#42717C
oklch(51.9% 0.054 214.4)
- #855E54
#855E54
oklch(52% 0.054 34.9)
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 #42717C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.034
- Deep Aqua #08787F ΔE 0.036
- Slate #516572 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.042
- Bluegreen #017A79 ΔE 0.044
- Dark Aquamarine #017371 ΔE 0.044
- Ocean #017B92 ΔE 0.046
- Sea Blue #047495 ΔE 0.048
Use #42717C 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.