#123B82
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.128 260.7), rgb(18, 59, 130).
Aa
White text reads best on this color (10.64:1).
About this color
#123B82 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.128 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.028 away. White text reads best on it, at 10.64:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.64:1 |
Values
| HEX | #123B82 |
| RGB | rgb(18, 59, 130) |
| HSL | hsl(218, 76%, 29%) |
| OKLCH | oklch(37% 0.128 260.7) |
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 #123B82 | 10.64:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #123B82 | 1.97:1 | Fails | Lc 9.8 | Not readable |
| #123B82 text on white | 10.64:1 | AAA | Lc 94.2 | Preferred for body text |
| #123B82 text on black | 1.97:1 | Fails | Lc -8.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3D83FE
oklch(63.1% 0.197 260.7)
-
Step 600
600
#1968ED
oklch(55.5% 0.214 260.7)
-
Step 700
700
#0A56CE
oklch(49.1% 0.198 260.6)
-
Step 800
800
#0E47A7
oklch(42.7% 0.165 260.7)
-
Step 900
900 (this color)
#123B82
oklch(37% 0.128 260.7)
-
Step 950
950
#0D244D
oklch(26.9% 0.081 260.9)
#123B82 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) | #044485 | 0.025 |
| Deuteranopia (no green cones) | #003A81 | 0.011 |
| Tritanopia (no blue cones) | #004C58 | 0.098 |
| Achromatopsia (no color) | #3E3E3E | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123B82
#123B82
oklch(37% 0.128 260.7)
- #543A00
#543A00
oklch(36.9% 0.076 80.3)
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 #123B82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.028
- Marine Blue #01386A ΔE 0.044
- Cobalt #1E488F ΔE 0.044
- Light Navy #155084 ΔE 0.062
- Sapphire #2138AB ΔE 0.070
- Marine #042E60 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.071
- Deep Sea Blue #015482 ΔE 0.073
Use #123B82 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.