#1C55A6
Closest named color: Dusk Blue (#26538D). oklch(46% 0.143 258.2), rgb(28, 85, 166).
Aa
White text reads best on this color (7.24:1).
About this color
#1C55A6 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.143 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.040 away. White text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #1C55A6 |
| RGB | rgb(28, 85, 166) |
| HSL | hsl(215, 71%, 38%) |
| OKLCH | oklch(46% 0.143 258.2) |
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 #1C55A6 | 7.24:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #1C55A6 | 2.89:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #1C55A6 text on white | 7.24:1 | AAA | Lc 84.7 | Fine for body text |
| #1C55A6 text on black | 2.89:1 | Fails | Lc -17.3 | 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
#CADAF3
oklch(88.4% 0.039 259.3)
-
Step 300
300
#A5C2EE
oklch(80.8% 0.07 258.6)
-
Step 400
400
#75A2E5
oklch(70.7% 0.11 258.1)
-
Step 500
500
#5089DE
oklch(63.1% 0.142 258.2)
-
Step 600
600
#3371CC
oklch(55.6% 0.155 258.2)
-
Step 700
700 (this color)
#1C55A6
oklch(46% 0.143 258.2)
-
Step 800
800
#214D8F
oklch(42.7% 0.12 258.6)
-
Step 900
900
#204172
oklch(37.7% 0.093 258.2)
-
Step 950
950
#132643
oklch(26.9% 0.06 258.6)
#1C55A6 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) | #265DA9 | 0.025 |
| Deuteranopia (no green cones) | #0051A4 | 0.018 |
| Tritanopia (no blue cones) | #006975 | 0.111 |
| Achromatopsia (no color) | #575757 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C55A6
#1C55A6
oklch(46% 0.143 258.2)
- #755000
#755000
oklch(46% 0.096 78)
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 #1C55A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.048
- Cobalt #1E488F ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.055
- Light Navy #155084 ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.062
- Mid Blue #276AB3 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.063
Use #1C55A6 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.