#1557A4
Closest named color: Dusk Blue (#26538D). oklch(46.1% 0.14 255.6), rgb(21, 87, 164).
Aa
White text reads best on this color (7.16:1).
About this color
#1557A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.140 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.038 away. White text reads best on it, at 7.16:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.93:1 |
| White text | 7.16:1 |
Values
| HEX | #1557A4 |
| RGB | rgb(21, 87, 164) |
| HSL | hsl(212, 77%, 36%) |
| OKLCH | oklch(46.1% 0.14 255.6) |
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 #1557A4 | 7.16:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #1557A4 | 2.93:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #1557A4 text on white | 7.16:1 | AAA | Lc 84.3 | Fine for body text |
| #1557A4 text on black | 2.93:1 | Fails | Lc -17.6 | 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A4C3EC
oklch(80.9% 0.067 255.5)
-
Step 400
400
#72A3E3
oklch(70.7% 0.108 255.5)
-
Step 500
500
#4C8BDB
oklch(63.2% 0.138 255.4)
-
Step 600
600
#2D73C9
oklch(55.7% 0.15 255.6)
-
Step 700
700 (this color)
#1557A4
oklch(46.1% 0.14 255.6)
-
Step 800
800
#1C4F8D
oklch(42.8% 0.116 255.4)
-
Step 900
900
#1D4270
oklch(37.7% 0.09 255.2)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#1557A4 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) | #2C5EA7 | 0.028 |
| Deuteranopia (no green cones) | #0052A2 | 0.018 |
| Tritanopia (no blue cones) | #006A75 | 0.106 |
| Achromatopsia (no color) | #585858 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1557A4
#1557A4
oklch(46.1% 0.14 255.6)
- #774F00
#774F00
oklch(46.1% 0.097 75.4)
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 #1557A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.045
- Cobalt #1E488F ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Peacock Blue #016795 ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
- Mid Blue #276AB3 ΔE 0.059
Use #1557A4 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.