#1B2D3F
Closest named color: Oxford Blue (#1B263B). oklch(29% 0.041 249.4), rgb(27, 45, 63).
Aa
White text reads best on this color (14.05:1).
About this color
#1B2D3F is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.041 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 14.05:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.49:1 |
| White text | 14.05:1 |
Values
| HEX | #1B2D3F |
| RGB | rgb(27, 45, 63) |
| HSL | hsl(210, 40%, 18%) |
| OKLCH | oklch(29% 0.041 249.4) |
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 #1B2D3F | 14.05:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #1B2D3F | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #1B2D3F text on white | 14.05:1 | AAA | Lc 100.7 | Preferred for body text |
| #1B2D3F text on black | 1.49:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#A9C4DF
oklch(80.9% 0.048 248.4)
-
Step 400
400
#7BA5CF
oklch(70.7% 0.077 249)
-
Step 500
500
#588EC3
oklch(63.1% 0.099 249.2)
-
Step 600
600
#3C77AF
oklch(55.5% 0.107 249.2)
-
Step 700
700
#2E6497
oklch(49.1% 0.1 249.4)
-
Step 800
800
#27527A
oklch(42.8% 0.082 248.8)
-
Step 900
900
#254462
oklch(37.7% 0.064 249.1)
-
Step 950
950 (this color)
#1B2D3F
oklch(29% 0.041 249.4)
#1B2D3F 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) | #262E40 | 0.017 |
| Deuteranopia (no green cones) | #212A3F | 0.012 |
| Tritanopia (no blue cones) | #093133 | 0.035 |
| Achromatopsia (no color) | #2C2C2C | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2D3F
#1B2D3F
oklch(29% 0.041 249.4)
- #392814
#392814
oklch(29.2% 0.041 69.5)
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 #1B2D3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.025
- Gunmetal #293241 ΔE 0.028
- Dark #1B2431 ΔE 0.035
- Jet #212529 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.047
- Midnight Green #073B4C ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.049
Use #1B2D3F 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.