#1C55AA
Closest named color: Dusk Blue (#26538D). oklch(46.3% 0.149 258.8), rgb(28, 85, 170).
Aa
White text reads best on this color (7.16:1).
About this color
#1C55AA is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.149 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.047 away. White text reads best on it, at 7.16:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.92:1 |
| White text | 7.16:1 |
Values
| HEX | #1C55AA |
| RGB | rgb(28, 85, 170) |
| HSL | hsl(216, 72%, 39%) |
| OKLCH | oklch(46.3% 0.149 258.8) |
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 #1C55AA | 7.16:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #1C55AA | 2.92:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #1C55AA text on white | 7.16:1 | AAA | Lc 84.4 | Fine for body text |
| #1C55AA text on black | 2.92:1 | 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
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C2F0
oklch(80.9% 0.073 259.5)
-
Step 400
400
#74A2E8
oklch(70.8% 0.115 258.6)
-
Step 500
500
#4F88E1
oklch(63% 0.147 259)
-
Step 600
600
#3270CF
oklch(55.6% 0.16 258.9)
-
Step 700
700 (this color)
#1C55AA
oklch(46.3% 0.149 258.8)
-
Step 800
800
#204D91
oklch(42.8% 0.123 258.7)
-
Step 900
900
#1F4174
oklch(37.8% 0.096 258.4)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#1C55AA 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) | #215EAD | 0.026 |
| Deuteranopia (no green cones) | #0052A8 | 0.016 |
| Tritanopia (no blue cones) | #006A77 | 0.115 |
| Achromatopsia (no color) | #585858 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C55AA
#1C55AA
oklch(46.3% 0.149 258.8)
- #755100
#755100
oklch(46.2% 0.096 79)
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 #1C55AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.053
- Cobalt #1E488F ΔE 0.054
- Mid Blue #276AB3 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.061
- Light Navy #155084 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.065
- Dusky Blue #475F94 ΔE 0.066
Use #1C55AA 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.