#274FB3
Closest named color: Blue Blue (#2242C7). oklch(46.1% 0.166 264.3), rgb(39, 79, 179).
Aa
White text reads best on this color (7.35:1).
About this color
#274FB3 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.166 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.044 away. White text reads best on it, at 7.35:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.85:1 |
| White text | 7.35:1 |
Values
| HEX | #274FB3 |
| RGB | rgb(39, 79, 179) |
| HSL | hsl(223, 64%, 43%) |
| OKLCH | oklch(46.1% 0.166 264.3) |
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 #274FB3 | 7.35:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #274FB3 | 2.85:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #274FB3 text on white | 7.35:1 | AAA | Lc 85.0 | Fine for body text |
| #274FB3 text on black | 2.85:1 | Fails | Lc -17.0 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CAD9F7
oklch(88.3% 0.045 264.3)
-
Step 300
300
#A7C1F5
oklch(81% 0.079 264)
-
Step 400
400
#789EF1
oklch(70.6% 0.129 264.6)
-
Step 500
500
#5684EC
oklch(63.2% 0.164 264.3)
-
Step 600
600
#3C6BDA
oklch(55.7% 0.178 264.2)
-
Step 700
700 (this color)
#274FB3
oklch(46.1% 0.166 264.3)
-
Step 800
800
#274999
oklch(42.8% 0.137 264.1)
-
Step 900
900
#243E7A
oklch(37.8% 0.107 264.3)
-
Step 950
950
#152547
oklch(27.1% 0.067 263.6)
#274FB3 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) | #005DB6 | 0.037 |
| Deuteranopia (no green cones) | #0050B1 | 0.020 |
| Tritanopia (no blue cones) | #006879 | 0.130 |
| Achromatopsia (no color) | #565656 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274FB3
#274FB3
oklch(46.1% 0.166 264.3)
- #715300
#715300
oklch(46.1% 0.095 84.3)
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 #274FB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.044
- Sapphire #2138AB ΔE 0.058
- Cobalt #1E488F ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.063
- Blueberry #464196 ΔE 0.064
- Dusk Blue #26538D ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.070
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
Use #274FB3 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.