#2257A4
Closest named color: Dusk Blue (#26538D). oklch(46.5% 0.136 258.2), rgb(34, 87, 164).
Aa
White text reads best on this color (7.07:1).
About this color
#2257A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.136 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.037 away. White text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #2257A4 |
| RGB | rgb(34, 87, 164) |
| HSL | hsl(216, 66%, 39%) |
| OKLCH | oklch(46.5% 0.136 258.2) |
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 #2257A4 | 7.07:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #2257A4 | 2.96:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #2257A4 text on white | 7.07:1 | AAA | Lc 84.1 | Fine for body text |
| #2257A4 text on black | 2.96:1 | Fails | Lc -17.9 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A7C2EC
oklch(80.8% 0.067 259.1)
-
Step 400
400
#77A2E2
oklch(70.7% 0.105 258.1)
-
Step 500
500
#5389DA
oklch(63% 0.136 258.3)
-
Step 600
600
#3772C7
oklch(55.6% 0.146 257.8)
-
Step 700
700 (this color)
#2257A4
oklch(46.5% 0.136 258.2)
-
Step 800
800
#244E8C
oklch(42.8% 0.113 258.2)
-
Step 900
900
#224170
oklch(37.7% 0.089 258.5)
-
Step 950
950
#142641
oklch(26.8% 0.056 258.3)
#2257A4 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) | #2D5FA7 | 0.026 |
| Deuteranopia (no green cones) | #0B53A2 | 0.019 |
| Tritanopia (no blue cones) | #006975 | 0.105 |
| Achromatopsia (no color) | #585858 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2257A4
#2257A4
oklch(46.5% 0.136 258.2)
- #775100
#775100
oklch(46.5% 0.097 77.5)
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 #2257A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.049
- Cobalt #1E488F ΔE 0.052
- Dusky Blue #475F94 ΔE 0.054
- Light Navy #155084 ΔE 0.056
- Mid Blue #276AB3 ΔE 0.056
- Peacock Blue #016795 ΔE 0.056
Use #2257A4 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.