#42717E
Closest named color: Metallic Blue (#4F738E). oklch(52% 0.055 217.5), rgb(66, 113, 126).
Aa
White text reads best on this color (5.39:1).
About this color
#42717E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.055 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.031 away. White text reads best on it, at 5.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.89:1 |
| White text | 5.39:1 |
Values
| HEX | #42717E |
| RGB | rgb(66, 113, 126) |
| HSL | hsl(193, 31%, 38%) |
| OKLCH | oklch(52% 0.055 217.5) |
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 #42717E | 5.39:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #42717E | 3.89:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #42717E text on white | 5.39:1 | AA | Lc 76.8 | Fine for body text |
| #42717E text on black | 3.89:1 | AA large text | Lc -25.0 | 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 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
#CFDCE0
oklch(88.6% 0.015 218.1)
-
Step 300
300
#AEC5CC
oklch(80.8% 0.027 218)
-
Step 400
400
#83A8B2
oklch(70.8% 0.043 216.1)
-
Step 500
500
#63929F
oklch(63.1% 0.054 217)
-
Step 600
600
#497C8A
oklch(55.6% 0.059 217.3)
-
Step 700
700 (this color)
#42717E
oklch(52% 0.055 217.5)
-
Step 800
800
#305560
oklch(42.6% 0.046 219)
-
Step 900
900
#2B464E
oklch(37.6% 0.035 218.5)
-
Step 950
950
#1A292E
oklch(27% 0.022 220.6)
#42717E 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) | #686E7F | 0.048 |
| Deuteranopia (no green cones) | #5F677E | 0.044 |
| Tritanopia (no blue cones) | #257675 | 0.034 |
| Achromatopsia (no color) | #6A6A6A | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42717E
#42717E
oklch(52% 0.055 217.5)
- #855E52
#855E52
oklch(52% 0.055 37.8)
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 #42717E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.031
- Slate #516572 ΔE 0.037
- Deep Aqua #08787F ΔE 0.037
- Deep Turquoise #017374 ΔE 0.043
- Ocean #017B92 ΔE 0.044
- Bluegreen #017A79 ΔE 0.045
- Sea Blue #047495 ΔE 0.046
- Dark Aquamarine #017371 ΔE 0.046
Use #42717E 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.