#42829E
Closest named color: Cerulean (#457B9D). oklch(57.6% 0.078 228.8), rgb(66, 130, 158).
Aa
Black text reads best on this color (4.91:1).
About this color
#42829E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.078 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.020 away. Black text reads best on it, at 4.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.91:1 |
| White text | 4.26:1 |
Values
| HEX | #42829E |
| RGB | rgb(66, 130, 158) |
| HSL | hsl(198, 41%, 44%) |
| OKLCH | oklch(57.6% 0.078 228.8) |
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 #42829E | 4.26:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #42829E | 4.91:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #42829E text on white | 4.26:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #42829E text on black | 4.91:1 | AA | Lc -32.3 | 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
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#AAC6D3
oklch(81% 0.035 227.5)
-
Step 400
400
#7CA8BD
oklch(70.7% 0.056 229)
-
Step 500
500
#5992AC
oklch(63.1% 0.071 228.9)
-
Step 600
600 (this color)
#42829E
oklch(57.6% 0.078 228.8)
-
Step 700
700
#2D6982
oklch(49.2% 0.073 228.4)
-
Step 800
800
#275569
oklch(42.6% 0.06 228.9)
-
Step 900
900
#254656
oklch(37.6% 0.047 230.9)
-
Step 950
950
#162932
oklch(26.9% 0.03 229.7)
#42829E 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) | #74809F | 0.057 |
| Deuteranopia (no green cones) | #66769E | 0.050 |
| Tritanopia (no blue cones) | #008A8B | 0.054 |
| Achromatopsia (no color) | #7A7A7A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42829E
#42829E
oklch(57.6% 0.078 228.8)
- #9F6B4F
#9F6B4F
oklch(57.6% 0.078 49)
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 #42829E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.020
- Stormy Blue #507B9C ΔE 0.022
- Teal Blue #01889F ΔE 0.032
- Off Blue #5684AE ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.037
- Blue NCS #118AB2 ΔE 0.037
- Dull Blue #49759C ΔE 0.038
Use #42829E 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.