#1A55AD
Closest named color: Dusk Blue (#26538D). oklch(46.5% 0.153 258.9), rgb(26, 85, 173).
Aa
White text reads best on this color (7.12:1).
About this color
#1A55AD is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.153 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.052 away. White text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.94:1 |
| White text | 7.12:1 |
Values
| HEX | #1A55AD |
| RGB | rgb(26, 85, 173) |
| HSL | hsl(216, 74%, 39%) |
| OKLCH | oklch(46.5% 0.153 258.9) |
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 #1A55AD | 7.12:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #1A55AD | 2.94:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #1A55AD text on white | 7.12:1 | AAA | Lc 84.2 | Fine for body text |
| #1A55AD text on black | 2.94:1 | Fails | Lc -17.8 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F1
oklch(80.8% 0.074 259.3)
-
Step 400
400
#73A1EA
oklch(70.6% 0.119 259.3)
-
Step 500
500
#4D88E4
oklch(63.1% 0.152 259)
-
Step 600
600
#3070D2
oklch(55.7% 0.165 258.9)
-
Step 700
700 (this color)
#1A55AD
oklch(46.5% 0.153 258.9)
-
Step 800
800
#1E4C93
oklch(42.6% 0.127 259.1)
-
Step 900
900
#1E4075
oklch(37.6% 0.099 259)
-
Step 950
950
#122645
oklch(27% 0.064 258.9)
#1A55AD 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) | #1C5FB0 | 0.028 |
| Deuteranopia (no green cones) | #0052AB | 0.015 |
| Tritanopia (no blue cones) | #006A79 | 0.116 |
| Achromatopsia (no color) | #585858 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A55AD
#1A55AD
oklch(46.5% 0.153 258.9)
- #765200
#765200
oklch(46.6% 0.097 79.3)
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 #1A55AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.057
- Cobalt #1E488F ΔE 0.057
- Mid Blue #276AB3 ΔE 0.060
- Blue Blue #2242C7 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.065
- Light Navy #155084 ΔE 0.068
- Dusky Blue #475F94 ΔE 0.069
Use #1A55AD 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.