#123056
Closest named color: Prussian Blue (#1D3557). oklch(30.9% 0.077 255.7), rgb(18, 48, 86).
Aa
White text reads best on this color (13.26:1).
About this color
#123056 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.077 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 13.26:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.58:1 |
| White text | 13.26:1 |
Values
| HEX | #123056 |
| RGB | rgb(18, 48, 86) |
| HSL | hsl(214, 65%, 20%) |
| OKLCH | oklch(30.9% 0.077 255.7) |
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 #123056 | 13.26:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #123056 | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #123056 text on white | 13.26:1 | AAA | Lc 99.4 | Preferred for body text |
| #123056 text on black | 1.58:1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFB
oklch(88.5% 0.051 256.7)
-
Step 300
300
#99C3FB
oklch(80.8% 0.092 255.8)
-
Step 400
400
#5FA2FA
oklch(70.7% 0.147 255.9)
-
Step 500
500
#2A88F7
oklch(63.2% 0.187 255.6)
-
Step 600
600
#0070DD
oklch(55.6% 0.187 255.6)
-
Step 700
700
#005EBC
oklch(49.2% 0.166 255.7)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#054080
oklch(37.7% 0.122 255.5)
-
Step 950
950 (this color)
#123056
oklch(30.9% 0.077 255.7)
#123056 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) | #1E3358 | 0.018 |
| Deuteranopia (no green cones) | #132D55 | 0.009 |
| Tritanopia (no blue cones) | #00393E | 0.061 |
| Achromatopsia (no color) | #303030 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123056
#123056
oklch(30.9% 0.077 255.7)
- #432A00
#432A00
oklch(30.8% 0.065 74.3)
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 #123056, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Marine #042E60 ΔE 0.022
- Marine Blue #01386A ΔE 0.040
- Midnight Green #073B4C ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.047
- Gunmetal #293241 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.053
Use #123056 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.