#42849E
Closest named color: Cerulean (#457B9D). oklch(58.1% 0.078 226.3), rgb(66, 132, 158).
Aa
Black text reads best on this color (5.02:1).
About this color
#42849E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.078 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.026 away. Black text reads best on it, at 5.02:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #42849E |
| RGB | rgb(66, 132, 158) |
| HSL | hsl(197, 41%, 44%) |
| OKLCH | oklch(58.1% 0.078 226.3) |
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 #42849E | 4.17:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #42849E | 5.02:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #42849E text on white | 4.17:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #42849E text on black | 5.02:1 | AA | Lc -33.0 | Non-text elements, placeholder text |
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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#AAC6D2
oklch(81% 0.035 225.6)
-
Step 400
400
#7BA8BC
oklch(70.6% 0.056 227.2)
-
Step 500
500
#5793AB
oklch(63.2% 0.072 225.7)
-
Step 600
600 (this color)
#42849E
oklch(58.1% 0.078 226.3)
-
Step 700
700
#2C6980
oklch(49.1% 0.072 226)
-
Step 800
800
#265668
oklch(42.8% 0.06 225.4)
-
Step 900
900
#244755
oklch(37.8% 0.047 226.2)
-
Step 950
950
#162932
oklch(26.9% 0.03 229.7)
#42849E 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) | #76829F | 0.059 |
| Deuteranopia (no green cones) | #69789E | 0.052 |
| Tritanopia (no blue cones) | #008C8C | 0.052 |
| Achromatopsia (no color) | #7C7C7C | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42849E
#42849E
oklch(58.1% 0.078 226.3)
- #A16C52
#A16C52
oklch(58.1% 0.078 46.9)
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 #42849E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.026
- Stormy Blue #507B9C ΔE 0.027
- Teal Blue #01889F ΔE 0.030
- Off Blue #5684AE ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.036
- Blue NCS #118AB2 ΔE 0.036
- Steel Blue #4682B4 ΔE 0.037
- Grey Blue #647D8E ΔE 0.041
Use #42849E 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.