#1C283F
Closest named color: Oxford Blue (#1B263B). oklch(27.8% 0.046 262.7), rgb(28, 40, 63).
Aa
White text reads best on this color (14.74:1).
About this color
#1C283F is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.046 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.009 away. White text reads best on it, at 14.74:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.42:1 |
| White text | 14.74:1 |
Values
| HEX | #1C283F |
| RGB | rgb(28, 40, 63) |
| HSL | hsl(219, 38%, 18%) |
| OKLCH | oklch(27.8% 0.046 262.7) |
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 #1C283F | 14.74:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #1C283F | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #1C283F text on white | 14.74:1 | AAA | Lc 101.5 | Preferred for body text |
| #1C283F text on black | 1.42:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAEE
oklch(88.6% 0.03 262.5)
-
Step 300
300
#AEC1E5
oklch(80.9% 0.055 263.2)
-
Step 400
400
#84A1D7
oklch(70.8% 0.086 262.5)
-
Step 500
500
#6588CD
oklch(63% 0.112 263.1)
-
Step 600
600
#4C71BA
oklch(55.6% 0.122 262.8)
-
Step 700
700
#3D5EA0
oklch(49% 0.113 262.9)
-
Step 800
800
#334D82
oklch(42.6% 0.094 263.2)
-
Step 900
900
#2C4168
oklch(37.7% 0.072 262)
-
Step 950
950 (this color)
#1C283F
oklch(27.8% 0.046 262.7)
#1C283F 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) | #1F2A40 | 0.009 |
| Deuteranopia (no green cones) | #1B273E | 0.004 |
| Tritanopia (no blue cones) | #0D2D30 | 0.042 |
| Achromatopsia (no color) | #282828 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C283F
#1C283F
oklch(27.8% 0.046 262.7)
- #33260A
#33260A
oklch(27.7% 0.046 83.7)
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 #1C283F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.009
- Dark #1B2431 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.031
- Jet #212529 ΔE 0.040
- Gunmetal #293241 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.055
- Marine #042E60 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.061
Use #1C283F 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.