#1243A2
Closest named color: Sapphire (#2138AB). oklch(41.5% 0.162 261.9), rgb(18, 67, 162).
Aa
White text reads best on this color (8.93:1).
About this color
#1243A2 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.162 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.029 away. White text reads best on it, at 8.93:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.35:1 |
| White text | 8.93:1 |
Values
| HEX | #1243A2 |
| RGB | rgb(18, 67, 162) |
| HSL | hsl(220, 80%, 35%) |
| OKLCH | oklch(41.5% 0.162 261.9) |
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 #1243A2 | 8.93:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #1243A2 | 2.35:1 | Fails | Lc 14.2 | Not readable |
| #1243A2 text on white | 8.93:1 | AAA | Lc 89.8 | Fine for body text |
| #1243A2 text on black | 2.35:1 | Fails | Lc -12.5 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFE
oklch(70.6% 0.151 262.1)
-
Step 500
500
#4382FD
oklch(63.1% 0.195 262)
-
Step 600
600
#2468EC
oklch(55.6% 0.211 261.9)
-
Step 700
700
#1755CD
oklch(49% 0.196 261.9)
-
Step 800
800 (this color)
#1243A2
oklch(41.5% 0.162 261.9)
-
Step 900
900
#183D83
oklch(37.7% 0.126 261.6)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#1243A2 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) | #0050A5 | 0.033 |
| Deuteranopia (no green cones) | #0043A0 | 0.008 |
| Tritanopia (no blue cones) | #005B6C | 0.123 |
| Achromatopsia (no color) | #494949 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1243A2
#1243A2
oklch(41.5% 0.162 261.9)
- #634600
#634600
oklch(41.5% 0.086 81.5)
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 #1243A2, closest first.
No curated palette has a color within ΔE 0.04 of #1243A2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.029
- Cobalt #1E488F ΔE 0.036
- Blueberry #464196 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.061
- Dusk Blue #26538D ΔE 0.062
- Light Navy #155084 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.071
Use #1243A2 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.