#2A57B1
Closest named color: Mid Blue (#276AB3). oklch(47.7% 0.152 262.3), rgb(42, 87, 177).
Aa
White text reads best on this color (6.78:1).
About this color
#2A57B1 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.152 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.052 away. White text reads best on it, at 6.78:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #2A57B1 |
| RGB | rgb(42, 87, 177) |
| HSL | hsl(220, 62%, 43%) |
| OKLCH | oklch(47.7% 0.152 262.3) |
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 #2A57B1 | 6.78:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #2A57B1 | 3.09:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #2A57B1 text on white | 6.78:1 | AA | Lc 83.0 | Fine for body text |
| #2A57B1 text on black | 3.09:1 | AA large text | Lc -19.0 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F1
oklch(80.8% 0.074 262.5)
-
Step 400
400
#78A0EA
oklch(70.7% 0.118 262.1)
-
Step 500
500
#5686E4
oklch(63.1% 0.151 262.5)
-
Step 600
600
#3B6ED2
oklch(55.7% 0.164 262.2)
-
Step 700
700 (this color)
#2A57B1
oklch(47.7% 0.152 262.3)
-
Step 800
800
#274B93
oklch(42.7% 0.126 262.4)
-
Step 900
900
#243F75
oklch(37.7% 0.098 262.6)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#2A57B1 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) | #1F62B4 | 0.029 |
| Deuteranopia (no green cones) | #0055AF | 0.023 |
| Tritanopia (no blue cones) | #006D7B | 0.121 |
| Achromatopsia (no color) | #5B5B5B | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A57B1
#2A57B1
oklch(47.7% 0.152 262.3)
- #785600
#785600
oklch(47.7% 0.098 81.9)
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 #2A57B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.055
- Dusk Blue #26538D ΔE 0.059
- Blue Blue #2242C7 ΔE 0.063
- Dusky Blue #475F94 ΔE 0.063
- French Blue #436BAD ΔE 0.065
- Cobalt #1E488F ΔE 0.068
- Light Navy Blue #2E5A88 ΔE 0.069
Use #2A57B1 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.