#42778A
Closest named color: Metallic Blue (#4F738E). oklch(54% 0.064 223.4), rgb(66, 119, 138).
Aa
White text reads best on this color (4.95:1).
About this color
#42778A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.064 and its hue 223°. 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 4.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.23:1 |
| White text | 4.95:1 |
Values
| HEX | #42778A |
| RGB | rgb(66, 119, 138) |
| HSL | hsl(196, 35%, 40%) |
| OKLCH | oklch(54% 0.064 223.4) |
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 #42778A | 4.95:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #42778A | 4.23:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #42778A text on white | 4.95:1 | AA | Lc 74.2 | Content text, not long reading |
| #42778A text on black | 4.23:1 | AA large text | Lc -27.5 | 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
#AEC5CE
oklch(80.9% 0.028 223.3)
-
Step 400
400
#82A7B6
oklch(70.6% 0.046 224.7)
-
Step 500
500
#6192A4
oklch(63.2% 0.059 223.1)
-
Step 600
600 (this color)
#42778A
oklch(54% 0.064 223.4)
-
Step 700
700
#386879
oklch(49% 0.059 223.2)
-
Step 800
800
#2F5563
oklch(42.7% 0.049 223.9)
-
Step 900
900
#2A4651
oklch(37.7% 0.039 224.9)
-
Step 950
950
#19292F
oklch(26.9% 0.024 223.4)
#42778A 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) | #6C758B | 0.051 |
| Deuteranopia (no green cones) | #626C8A | 0.047 |
| Tritanopia (no blue cones) | #177D7D | 0.043 |
| Achromatopsia (no color) | #707070 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42778A
#42778A
oklch(54% 0.064 223.4)
- #8F6351
#8F6351
oklch(54.1% 0.064 43.1)
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 #42778A, 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 0.030
- Dull Blue #49759C ΔE 0.033
- Ocean #017B92 ΔE 0.033
- Stormy Blue #507B9C ΔE 0.034
- Deep Aqua #08787F ΔE 0.040
- Sea Blue #047495 ΔE 0.040
- Muted Blue #3B719F ΔE 0.043
Use #42778A 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.