#2B57B7
Closest named color: Mid Blue (#276AB3). oklch(48.2% 0.16 263.2), rgb(43, 87, 183).
Aa
White text reads best on this color (6.66:1).
About this color
#2B57B7 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.160 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.053 away. White text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.14:1 |
| White text | 6.66:1 |
Values
| HEX | #2B57B7 |
| RGB | rgb(43, 87, 183) |
| HSL | hsl(221, 62%, 44%) |
| OKLCH | oklch(48.2% 0.16 263.2) |
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 #2B57B7 | 6.66:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #2B57B7 | 3.14:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #2B57B7 text on white | 6.66:1 | AA | Lc 82.5 | Fine for body text |
| #2B57B7 text on black | 3.14:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A7C1F3
oklch(80.9% 0.077 263.3)
-
Step 400
400
#779FEE
oklch(70.6% 0.124 263.1)
-
Step 500
500
#5585E8
oklch(63.1% 0.158 263.1)
-
Step 600
600
#3B6CD6
oklch(55.5% 0.172 263.3)
-
Step 700
700 (this color)
#2B57B7
oklch(48.2% 0.16 263.2)
-
Step 800
800
#264A96
oklch(42.7% 0.132 263)
-
Step 900
900
#233F78
oklch(37.8% 0.103 262.8)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#2B57B7 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) | #1463BA | 0.032 |
| Deuteranopia (no green cones) | #0056B5 | 0.023 |
| Tritanopia (no blue cones) | #006E7E | 0.126 |
| Achromatopsia (no color) | #5C5C5C | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B57B7
#2B57B7
oklch(48.2% 0.16 263.2)
- #795800
#795800
oklch(48.2% 0.099 83.2)
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 #2B57B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.053
- Blue Blue #2242C7 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.064
- French Blue #436BAD ΔE 0.067
- Warm Blue #4B57DB ΔE 0.067
- Dusk Blue #26538D ΔE 0.068
- Dusky Blue #475F94 ΔE 0.070
- Iris #6258C4 ΔE 0.072
Use #2B57B7 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.