#1B293B
Closest named color: Oxford Blue (#1B263B). oklch(27.7% 0.039 255.1), rgb(27, 41, 59).
Aa
White text reads best on this color (14.71:1).
About this color
#1B293B is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.039 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.010 away. White text reads best on it, at 14.71:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.42:1 |
| White text | 14.71:1 |
Values
| HEX | #1B293B |
| RGB | rgb(27, 41, 59) |
| HSL | hsl(214, 37%, 17%) |
| OKLCH | oklch(27.7% 0.039 255.1) |
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 #1B293B | 14.71:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #1B293B | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #1B293B text on white | 14.71:1 | AAA | Lc 101.5 | Preferred for body text |
| #1B293B text on black | 1.42:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ADC3DE
oklch(80.9% 0.045 253.6)
-
Step 400
400
#82A3CE
oklch(70.7% 0.073 255.2)
-
Step 500
500
#628CC1
oklch(63.1% 0.093 254.7)
-
Step 600
600
#4875AE
oklch(55.6% 0.102 255)
-
Step 700
700
#3A6295
oklch(49.1% 0.094 255.2)
-
Step 800
800
#305079
oklch(42.6% 0.078 255.2)
-
Step 900
900
#2B4362
oklch(37.8% 0.061 255.3)
-
Step 950
950 (this color)
#1B293B
oklch(27.7% 0.039 255.1)
#1B293B 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) | #222A3C | 0.012 |
| Deuteranopia (no green cones) | #1E273B | 0.008 |
| Tritanopia (no blue cones) | #0E2D2F | 0.034 |
| Achromatopsia (no color) | #282828 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B293B
#1B293B
oklch(27.7% 0.039 255.1)
- #332511
#332511
oklch(27.6% 0.039 74.8)
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 #1B293B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.010
- Dark #1B2431 ΔE 0.022
- Space Cadet #2B2D42 ΔE 0.032
- Jet #212529 ΔE 0.033
- Gunmetal #293241 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.060
- Midnight Green #073B4C ΔE 0.061
Use #1B293B 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.