#1A203C
Closest named color: Oxford Blue (#1B263B). oklch(25.3% 0.054 272.9), rgb(26, 32, 60).
Aa
White text reads best on this color (15.96:1).
About this color
#1A203C is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.054 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.021 away. White text reads best on it, at 15.96:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.96:1 |
Values
| HEX | #1A203C |
| RGB | rgb(26, 32, 60) |
| HSL | hsl(229, 40%, 17%) |
| OKLCH | oklch(25.3% 0.054 272.9) |
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 #1A203C | 15.96:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #1A203C | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #1A203C text on white | 15.96:1 | AAA | Lc 102.8 | Preferred for body text |
| #1A203C text on black | 1.31:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B3BFEA
oklch(81% 0.062 272.7)
-
Step 400
400
#8B9CE0
oklch(70.6% 0.102 272.8)
-
Step 500
500
#7082D7
oklch(63% 0.129 273.1)
-
Step 600
600
#596AC5
oklch(55.6% 0.142 273)
-
Step 700
700
#4958AA
oklch(49.1% 0.131 272.9)
-
Step 800
800
#3C488A
oklch(42.6% 0.11 273.1)
-
Step 900
900
#333D6E
oklch(37.7% 0.085 273)
-
Step 950
950 (this color)
#1A203C
oklch(25.3% 0.054 272.9)
#1A203C 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) | #15233D | 0.011 |
| Deuteranopia (no green cones) | #12203B | 0.012 |
| Tritanopia (no blue cones) | #0C262B | 0.047 |
| Achromatopsia (no color) | #222222 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A203C
#1A203C
oklch(25.3% 0.054 272.9)
- #2B2100
#2B2100
oklch(25.2% 0.052 92.1)
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 #1A203C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.021
- Dark #1B2431 ΔE 0.028
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.054
- Navy Blue #001146 ΔE 0.066
- Gunmetal #293241 ΔE 0.067
- Dark Indigo #1F0954 ΔE 0.072
Use #1A203C 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.