#2742AD
Closest named color: Sapphire (#2138AB). oklch(43% 0.174 267.4), rgb(39, 66, 173).
Aa
White text reads best on this color (8.50:1).
About this color
#2742AD is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.174 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.025 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #2742AD |
| RGB | rgb(39, 66, 173) |
| HSL | hsl(228, 63%, 42%) |
| OKLCH | oklch(43% 0.174 267.4) |
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 #2742AD | 8.50:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #2742AD | 2.46:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #2742AD text on white | 8.50:1 | AAA | Lc 88.7 | Fine for body text |
| #2742AD text on black | 2.46:1 | Fails | Lc -13.5 | Not readable |
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 800.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#557EFF
oklch(63.2% 0.197 267.3)
-
Step 600
600
#3B60F4
oklch(55.5% 0.225 267.5)
-
Step 700
700
#2E4ED5
oklch(49.1% 0.21 267.4)
-
Step 800
800 (this color)
#2742AD
oklch(43% 0.174 267.4)
-
Step 900
900
#223988
oklch(37.7% 0.135 267.2)
-
Step 950
950
#142250
oklch(27% 0.086 267.5)
#2742AD 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) | #0053B1 | 0.043 |
| Deuteranopia (no green cones) | #0047AB | 0.023 |
| Tritanopia (no blue cones) | #005E71 | 0.137 |
| Achromatopsia (no color) | #4D4D4D | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2742AD
#2742AD
oklch(43% 0.174 267.4)
- #644C00
#644C00
oklch(43% 0.088 87.7)
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 #2742AD, closest first.
No curated palette has a color within ΔE 0.04 of #2742AD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.025
- Blue Blue #2242C7 ΔE 0.042
- Cobalt #1E488F ΔE 0.053
- Blueberry #464196 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.070
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
- Dusk Blue #26538D ΔE 0.072
Use #2742AD 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.