#1C427A
Closest named color: Twilight Blue (#0A437A). oklch(38.4% 0.105 258.3), rgb(28, 66, 122).
Aa
White text reads best on this color (9.95:1).
About this color
#1C427A is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.105 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.011 away. White text reads best on it, at 9.95:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.95:1 |
Values
| HEX | #1C427A |
| RGB | rgb(28, 66, 122) |
| HSL | hsl(216, 63%, 29%) |
| OKLCH | oklch(38.4% 0.105 258.3) |
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 #1C427A | 9.95:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #1C427A | 2.10:1 | Fails | Lc 11.2 | Not readable |
| #1C427A text on white | 9.95:1 | AAA | Lc 92.8 | Preferred for body text |
| #1C427A text on black | 2.10:1 | Fails | Lc -9.7 | Not readable |
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 900.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A2C3F4
oklch(81% 0.078 258.1)
-
Step 400
400
#6EA1EE
oklch(70.6% 0.126 258.4)
-
Step 500
500
#4788E9
oklch(63.2% 0.161 258.3)
-
Step 600
600
#276FD7
oklch(55.6% 0.175 258.4)
-
Step 700
700
#195CBA
oklch(49% 0.162 258.3)
-
Step 800
800
#184C97
oklch(42.7% 0.135 258.4)
-
Step 900
900 (this color)
#1C427A
oklch(38.4% 0.105 258.3)
-
Step 950
950
#102646
oklch(27% 0.066 257.9)
#1C427A 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) | #26477C | 0.019 |
| Deuteranopia (no green cones) | #143F79 | 0.012 |
| Tritanopia (no blue cones) | #004F58 | 0.081 |
| Achromatopsia (no color) | #434343 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C427A
#1C427A
oklch(38.4% 0.105 258.3)
- #5A3D00
#5A3D00
oklch(38.3% 0.08 78.5)
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 #1C427A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.011
- Cobalt #1E488F ΔE 0.038
- Light Navy #155084 ΔE 0.042
- Marine Blue #01386A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.053
- Dusk Blue #26538D ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.066
Use #1C427A 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.