#12253F
Closest named color: Oxford Blue (#1B263B). oklch(26.3% 0.055 256.7), rgb(18, 37, 63).
Aa
White text reads best on this color (15.41:1).
About this color
#12253F is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.055 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.015 away. White text reads best on it, at 15.41:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.41:1 |
Values
| HEX | #12253F |
| RGB | rgb(18, 37, 63) |
| HSL | hsl(215, 56%, 16%) |
| OKLCH | oklch(26.3% 0.055 256.7) |
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 #12253F | 15.41:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #12253F | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #12253F text on white | 15.41:1 | AAA | Lc 102.2 | Preferred for body text |
| #12253F text on black | 1.36:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A6C3EB
oklch(80.9% 0.065 256.5)
-
Step 400
400
#76A3E1
oklch(70.8% 0.104 256.6)
-
Step 500
500
#518AD9
oklch(63.1% 0.134 256.9)
-
Step 600
600
#3473C6
oklch(55.7% 0.144 256.4)
-
Step 700
700
#2660AB
oklch(49.2% 0.134 256.3)
-
Step 800
800
#214E8B
oklch(42.6% 0.113 256.9)
-
Step 900
900
#20426F
oklch(37.8% 0.087 256.2)
-
Step 950
950 (this color)
#12253F
oklch(26.3% 0.055 256.7)
#12253F 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) | #1A2740 | 0.013 |
| Deuteranopia (no green cones) | #14233E | 0.007 |
| Tritanopia (no blue cones) | #002B2F | 0.045 |
| Achromatopsia (no color) | #252525 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12253F
#12253F
oklch(26.3% 0.055 256.7)
- #342000
#342000
oklch(26.3% 0.055 75.1)
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 #12253F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.015
- Dark #1B2431 ΔE 0.028
- Jet #212529 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.050
- Gunmetal #293241 ΔE 0.058
- Marine #042E60 ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.066
Use #12253F 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.