#2F42AF
Closest named color: Sapphire (#2138AB). oklch(43.6% 0.174 269.9), rgb(47, 66, 175).
Aa
White text reads best on this color (8.33:1).
About this color
#2F42AF is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.174 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.031 away. White text reads best on it, at 8.33:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.51:1 |
| White text | 8.33:1 |
Values
| HEX | #2F42AF |
| RGB | rgb(47, 66, 175) |
| HSL | hsl(231, 58%, 44%) |
| OKLCH | oklch(43.6% 0.174 269.9) |
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 #2F42AF | 8.33:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #2F42AF | 2.51:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #2F42AF text on white | 8.33:1 | AAA | Lc 88.2 | Fine for body text |
| #2F42AF text on black | 2.51:1 | Fails | Lc -14.0 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#445EF5
oklch(55.7% 0.226 269.8)
-
Step 700
700
#374CD5
oklch(49.2% 0.21 269.8)
-
Step 800
800 (this color)
#2F42AF
oklch(43.6% 0.174 269.9)
-
Step 900
900
#273888
oklch(37.8% 0.135 269.7)
-
Step 950
950
#172150
oklch(26.9% 0.087 270.5)
#2F42AF 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) | #0054B3 | 0.047 |
| Deuteranopia (no green cones) | #0048AD | 0.031 |
| Tritanopia (no blue cones) | #005E72 | 0.139 |
| Achromatopsia (no color) | #4E4E4E | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F42AF
#2F42AF
oklch(43.6% 0.174 269.9)
- #644E00
#644E00
oklch(43.5% 0.089 90)
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 #2F42AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.031
- Blue Blue #2242C7 ΔE 0.040
- Majorelle Blue #3F37C9 ΔE 0.049
- Blueberry #464196 ΔE 0.051
- Cobalt #1E488F ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.068
- Blurple #5539CC ΔE 0.071
Use #2F42AF 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.