#2F57BB
Closest named color: Mid Blue (#276AB3). oklch(48.7% 0.164 264.6), rgb(47, 87, 187).
Aa
White text reads best on this color (6.55:1).
About this color
#2F57BB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.164 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.054 away. White text reads best on it, at 6.55:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.20:1 |
| White text | 6.55:1 |
Values
| HEX | #2F57BB |
| RGB | rgb(47, 87, 187) |
| HSL | hsl(223, 60%, 46%) |
| OKLCH | oklch(48.7% 0.164 264.6) |
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 #2F57BB | 6.55:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #2F57BB | 3.20:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #2F57BB text on white | 6.55:1 | AA | Lc 82.0 | Fine for body text |
| #2F57BB text on black | 3.20:1 | AA large text | Lc -19.9 | 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
#CBD9F7
oklch(88.4% 0.044 265.6)
-
Step 300
300
#A7C1F5
oklch(81% 0.079 264)
-
Step 400
400
#799EF0
oklch(70.7% 0.128 264.9)
-
Step 500
500
#5784EB
oklch(63.2% 0.163 264.5)
-
Step 600
600
#3E6BD9
oklch(55.7% 0.176 264.6)
-
Step 700
700 (this color)
#2F57BB
oklch(48.7% 0.164 264.6)
-
Step 800
800
#284998
oklch(42.7% 0.135 264.3)
-
Step 900
900
#253E79
oklch(37.8% 0.105 264.6)
-
Step 950
950
#162547
oklch(27.1% 0.066 264.5)
#2F57BB 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) | #0964BF | 0.035 |
| Deuteranopia (no green cones) | #0057B9 | 0.025 |
| Tritanopia (no blue cones) | #006F80 | 0.130 |
| Achromatopsia (no color) | #5D5D5D | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F57BB
#2F57BB
oklch(48.7% 0.164 264.6)
- #7A5A00
#7A5A00
oklch(48.8% 0.1 84.4)
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 #2F57BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.060
- Iris #6258C4 ΔE 0.067
- French Blue #436BAD ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.069
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Majorelle Blue #3F37C9 ΔE 0.072
Use #2F57BB 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.