#1B2C4B
Closest named color: Space Cadet (#2B2D42). oklch(29.5% 0.061 261.6), rgb(27, 44, 75).
Aa
White text reads best on this color (13.92:1).
About this color
#1B2C4B is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.061 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Space Cadet (#2B2D42), ΔE 0.029 away. White text reads best on it, at 13.92:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.50:1 |
| White text | 13.92:1 |
Values
| HEX | #1B2C4B |
| RGB | rgb(27, 44, 75) |
| HSL | hsl(219, 47%, 20%) |
| OKLCH | oklch(29.5% 0.061 261.6) |
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 #1B2C4B | 13.92:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #1B2C4B | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #1B2C4B text on white | 13.92:1 | AAA | Lc 100.4 | Preferred for body text |
| #1B2C4B text on black | 1.50:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A7C2F0
oklch(81% 0.072 261)
-
Step 400
400
#78A0E9
oklch(70.7% 0.116 261.9)
-
Step 500
500
#5587E2
oklch(63.1% 0.148 261.4)
-
Step 600
600
#3A6ED0
oklch(55.5% 0.162 261.7)
-
Step 700
700
#2D5CB4
oklch(49.1% 0.149 261.5)
-
Step 800
800
#264B92
oklch(42.6% 0.125 261.9)
-
Step 900
900
#234074
oklch(37.8% 0.096 261.1)
-
Step 950
950 (this color)
#1B2C4B
oklch(29.5% 0.061 261.6)
#1B2C4B 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) | #1F2F4C | 0.012 |
| Deuteranopia (no green cones) | #192A4A | 0.007 |
| Tritanopia (no blue cones) | #003337 | 0.055 |
| Achromatopsia (no color) | #2C2C2C | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2C4B
#1B2C4B
oklch(29.5% 0.061 261.6)
- #3C2900
#3C2900
oklch(29.6% 0.061 81.5)
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 #1B2C4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.029
- Oxford Blue #1B263B ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.033
- Gunmetal #293241 ΔE 0.037
- Marine #042E60 ΔE 0.041
- Midnight Green #073B4C ΔE 0.050
- Dark #1B2431 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.051
Use #1B2C4B 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.