#123753
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.065 244.8), rgb(18, 55, 83).
Aa
White text reads best on this color (12.37:1).
About this color
#123753 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.065 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.015 away. White text reads best on it, at 12.37:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.37:1 |
Values
| HEX | #123753 |
| RGB | rgb(18, 55, 83) |
| HSL | hsl(206, 64%, 20%) |
| OKLCH | oklch(32.5% 0.065 244.8) |
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 #123753 | 12.37:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #123753 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #123753 text on white | 12.37:1 | AAA | Lc 97.9 | Preferred for body text |
| #123753 text on black | 1.69:1 | 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 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A7C5DF
oklch(81% 0.049 244.6)
-
Step 400
400
#77A6CE
oklch(70.7% 0.078 244.9)
-
Step 500
500
#518FC2
oklch(63% 0.101 245.2)
-
Step 600
600
#3379AE
oklch(55.6% 0.108 244.5)
-
Step 700
700
#256596
oklch(49% 0.102 245.4)
-
Step 800
800
#215379
oklch(42.7% 0.083 244.6)
-
Step 900
900 (this color)
#123753
oklch(32.5% 0.065 244.8)
-
Step 950
950
#142839
oklch(26.9% 0.041 245.8)
#123753 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) | #2A3854 | 0.028 |
| Deuteranopia (no green cones) | #213252 | 0.020 |
| Tritanopia (no blue cones) | #003E41 | 0.047 |
| Achromatopsia (no color) | #343434 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123753
#123753
oklch(32.5% 0.065 244.8)
- #4B2C09
#4B2C09
oklch(32.5% 0.065 64.2)
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 #123753, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.015
- Midnight Green #073B4C ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.024
- Gunmetal #293241 ΔE 0.039
- Marine Blue #01386A ΔE 0.041
- Marine #042E60 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.045
- Onyx #343A40 ΔE 0.055
Use #123753 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.