#123258
Closest named color: Prussian Blue (#1D3557). oklch(31.5% 0.078 254.6), rgb(18, 50, 88).
Aa
White text reads best on this color (12.93:1).
About this color
#123258 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.078 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.016 away. White text reads best on it, at 12.93:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.93:1 |
Values
| HEX | #123258 |
| RGB | rgb(18, 50, 88) |
| HSL | hsl(213, 66%, 21%) |
| OKLCH | oklch(31.5% 0.078 254.6) |
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 #123258 | 12.93:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #123258 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #123258 text on white | 12.93:1 | AAA | Lc 98.9 | Preferred for body text |
| #123258 text on black | 1.62:1 | 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
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C3DCFB
oklch(88.6% 0.051 253.9)
-
Step 300
300
#98C4FC
oklch(80.9% 0.093 254.7)
-
Step 400
400
#5BA3FA
oklch(70.7% 0.147 254.3)
-
Step 500
500
#2188F7
oklch(63% 0.188 254.6)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900
#004080
oklch(37.6% 0.123 254.7)
-
Step 950
950 (this color)
#123258
oklch(31.5% 0.078 254.6)
#123258 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) | #20355A | 0.019 |
| Deuteranopia (no green cones) | #152E57 | 0.012 |
| Tritanopia (no blue cones) | #003B40 | 0.061 |
| Achromatopsia (no color) | #313131 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123258
#123258
oklch(31.5% 0.078 254.6)
- #452C00
#452C00
oklch(31.6% 0.067 75.3)
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 #123258, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.016
- Marine #042E60 ΔE 0.023
- Marine Blue #01386A ΔE 0.034
- Midnight Green #073B4C ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.048
- Gunmetal #293241 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.059
Use #123258 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.