#3151C7
Closest named color: Blue Blue (#2242C7). oklch(48.6% 0.187 267.3), rgb(49, 81, 199).
Aa
White text reads best on this color (6.70:1).
About this color
#3151C7 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.187 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.039 away. White text reads best on it, at 6.70:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.13:1 |
| White text | 6.70:1 |
Values
| HEX | #3151C7 |
| RGB | rgb(49, 81, 199) |
| HSL | hsl(227, 60%, 49%) |
| OKLCH | oklch(48.6% 0.187 267.3) |
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 #3151C7 | 6.70:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3151C7 | 3.13:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3151C7 text on white | 6.70:1 | AA | Lc 82.5 | Fine for body text |
| #3151C7 text on black | 3.13:1 | AA large text | Lc -19.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A7BFFC
oklch(80.9% 0.091 267.7)
-
Step 400
400
#789CFB
oklch(70.8% 0.145 267)
-
Step 500
500
#587FF8
oklch(63% 0.186 267.4)
-
Step 600
600
#4065E7
oklch(55.6% 0.201 267.4)
-
Step 700
700 (this color)
#3151C7
oklch(48.6% 0.187 267.3)
-
Step 800
800
#2A45A2
oklch(42.8% 0.154 267.2)
-
Step 900
900
#253B81
oklch(37.7% 0.121 267.2)
-
Step 950
950
#16234B
oklch(26.9% 0.076 267.6)
#3151C7 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) | #0063CB | 0.046 |
| Deuteranopia (no green cones) | #0055C5 | 0.027 |
| Tritanopia (no blue cones) | #006F84 | 0.148 |
| Achromatopsia (no color) | #5C5C5C | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3151C7
#3151C7
oklch(48.6% 0.187 267.3)
- #775B00
#775B00
oklch(48.6% 0.099 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 #3151C7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.039
- Warm Blue #4B57DB ΔE 0.048
- Majorelle Blue #3F37C9 ΔE 0.053
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Blurple #5539CC ΔE 0.063
- Azul #1D5DEC ΔE 0.063
- Iris #6258C4 ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.071
Use #3151C7 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.