#2F45B0
Closest named color: Sapphire (#2138AB). oklch(44.2% 0.172 269.2), rgb(47, 69, 176).
Aa
White text reads best on this color (8.07:1).
About this color
#2F45B0 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.172 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.037 away. White text reads best on it, at 8.07:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.59:1 |
| White text | 8.07:1 |
Values
| HEX | #2F45B0 |
| RGB | rgb(47, 69, 176) |
| HSL | hsl(230, 58%, 44%) |
| OKLCH | oklch(44.2% 0.172 269.2) |
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 #2F45B0 | 8.07:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #2F45B0 | 2.59:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #2F45B0 text on white | 8.07:1 | AAA | Lc 87.4 | Fine for body text |
| #2F45B0 text on black | 2.59:1 | Fails | Lc -14.7 | 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
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600
#425FF3
oklch(55.6% 0.223 269.2)
-
Step 700
700
#354DD4
oklch(49.1% 0.208 269.2)
-
Step 800
800 (this color)
#2F45B0
oklch(44.2% 0.172 269.2)
-
Step 900
900
#263887
oklch(37.6% 0.134 269.2)
-
Step 950
950
#16224F
oklch(27% 0.084 268.9)
#2F45B0 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) | #0056B4 | 0.045 |
| Deuteranopia (no green cones) | #004AAE | 0.030 |
| Tritanopia (no blue cones) | #006074 | 0.136 |
| Achromatopsia (no color) | #505050 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F45B0
#2F45B0
oklch(44.2% 0.172 269.2)
- #675000
#675000
oklch(44.3% 0.09 89.5)
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 #2F45B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.037
- Blue Blue #2242C7 ΔE 0.039
- Majorelle Blue #3F37C9 ΔE 0.050
- 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 0.069
- Blurple #5539CC ΔE 0.070
Use #2F45B0 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.