#2F57BF
Closest named color: Blue Blue (#2242C7). oklch(49% 0.17 264.9), rgb(47, 87, 191).
Aa
White text reads best on this color (6.48:1).
About this color
#2F57BF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.170 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.054 away. White text reads best on it, at 6.48:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.23:1 |
| White text | 6.48:1 |
Values
| HEX | #2F57BF |
| RGB | rgb(47, 87, 191) |
| HSL | hsl(223, 61%, 47%) |
| OKLCH | oklch(49% 0.17 264.9) |
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 #2F57BF | 6.48:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #2F57BF | 3.23:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #2F57BF text on white | 6.48:1 | AA | Lc 81.7 | Fine for body text |
| #2F57BF text on black | 3.23:1 | AA large text | Lc -20.2 | 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
#CAD9F8
oklch(88.4% 0.046 264.9)
-
Step 300
300
#A7C0F7
oklch(80.9% 0.083 265.6)
-
Step 400
400
#789EF3
oklch(70.8% 0.132 264.9)
-
Step 500
500
#5683EE
oklch(63.1% 0.168 264.8)
-
Step 600
600
#3D6ADC
oklch(55.6% 0.182 264.8)
-
Step 700
700 (this color)
#2F57BF
oklch(49% 0.17 264.9)
-
Step 800
800
#28489B
oklch(42.7% 0.141 265)
-
Step 900
900
#243D7B
oklch(37.6% 0.11 265)
-
Step 950
950
#152448
oklch(26.9% 0.07 265)
#2F57BF 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) | #0065C3 | 0.038 |
| Deuteranopia (no green cones) | #0058BD | 0.025 |
| Tritanopia (no blue cones) | #007082 | 0.134 |
| Achromatopsia (no color) | #5E5E5E | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F57BF
#2F57BF
oklch(49% 0.17 264.9)
- #7A5B00
#7A5B00
oklch(49% 0.1 85.4)
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 #2F57BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.054
- Warm Blue #4B57DB ΔE 0.055
- Mid Blue #276AB3 ΔE 0.056
- Iris #6258C4 ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.070
- French Blue #436BAD ΔE 0.070
- Majorelle Blue #3F37C9 ΔE 0.070
- Azul #1D5DEC ΔE 0.071
Use #2F57BF 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.