#42788D
Closest named color: Metallic Blue (#4F738E). oklch(54.4% 0.066 225.4), rgb(66, 120, 141).
Aa
White text reads best on this color (4.88:1).
About this color
#42788D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.066 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.020 away. White text reads best on it, at 4.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.30:1 |
| White text | 4.88:1 |
Values
| HEX | #42788D |
| RGB | rgb(66, 120, 141) |
| HSL | hsl(197, 36%, 41%) |
| OKLCH | oklch(54.4% 0.066 225.4) |
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 #42788D | 4.88:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #42788D | 4.30:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #42788D text on white | 4.88:1 | AA | Lc 73.7 | Content text, not long reading |
| #42788D text on black | 4.30:1 | AA large text | Lc -28.0 | 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
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ADC5CF
oklch(80.9% 0.03 224.8)
-
Step 400
400
#81A7B7
oklch(70.6% 0.047 225.6)
-
Step 500
500
#6092A5
oklch(63.2% 0.061 223.9)
-
Step 600
600 (this color)
#42788D
oklch(54.4% 0.066 225.4)
-
Step 700
700
#37687B
oklch(49.1% 0.061 225.4)
-
Step 800
800
#2E5564
oklch(42.7% 0.051 225)
-
Step 900
900
#294652
oklch(37.7% 0.04 226.3)
-
Step 950
950
#192930
oklch(27% 0.025 227.2)
#42788D 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) | #6C768E | 0.050 |
| Deuteranopia (no green cones) | #626D8D | 0.047 |
| Tritanopia (no blue cones) | #137E7F | 0.045 |
| Achromatopsia (no color) | #717171 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42788D
#42788D
oklch(54.4% 0.066 225.4)
- #90644F
#90644F
oklch(54.4% 0.065 46.4)
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 #42788D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.020
- Cerulean #457B9D ΔE 0.025
- Dull Blue #49759C ΔE 0.029
- Stormy Blue #507B9C ΔE 0.030
- Ocean #017B92 ΔE 0.033
- Sea Blue #047495 ΔE 0.040
- Muted Blue #3B719F ΔE 0.041
- Deep Aqua #08787F ΔE 0.043
Use #42788D 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.