#2F51BE
Closest named color: Blue Blue (#2242C7). oklch(47.7% 0.176 266.5), rgb(47, 81, 190).
Aa
White text reads best on this color (6.90:1).
About this color
#2F51BE is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.176 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.041 away. White text reads best on it, at 6.90:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.04:1 |
| White text | 6.90:1 |
Values
| HEX | #2F51BE |
| RGB | rgb(47, 81, 190) |
| HSL | hsl(226, 60%, 46%) |
| OKLCH | oklch(47.7% 0.176 266.5) |
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 #2F51BE | 6.90:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #2F51BE | 3.04:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #2F51BE text on white | 6.90:1 | AA | Lc 83.3 | Fine for body text |
| #2F51BE text on black | 3.04:1 | AA large text | Lc -18.6 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F9
oklch(80.9% 0.086 266.1)
-
Step 400
400
#799DF5
oklch(70.7% 0.135 266.2)
-
Step 500
500
#5981F1
oklch(63% 0.174 266.7)
-
Step 600
600
#4068E0
oklch(55.7% 0.188 266.4)
-
Step 700
700 (this color)
#2F51BE
oklch(47.7% 0.176 266.5)
-
Step 800
800
#2A469D
oklch(42.6% 0.146 266.6)
-
Step 900
900
#263C7D
oklch(37.7% 0.114 266.8)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#2F51BE 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) | #0061C2 | 0.042 |
| Deuteranopia (no green cones) | #0054BC | 0.026 |
| Tritanopia (no blue cones) | #006C7F | 0.139 |
| Achromatopsia (no color) | #5A5A5A | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F51BE
#2F51BE
oklch(47.7% 0.176 266.5)
- #755800
#755800
oklch(47.7% 0.098 86.3)
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 #2F51BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.041
- Majorelle Blue #3F37C9 ΔE 0.057
- Warm Blue #4B57DB ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blurple #5539CC ΔE 0.068
- Mid Blue #276AB3 ΔE 0.070
- Sapphire #2138AB ΔE 0.071
- Iris #6258C4 ΔE 0.072
Use #2F51BE 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.