#1D274F
Closest named color: Oxford Blue (#1B263B). oklch(28.7% 0.074 270.6), rgb(29, 39, 79).
Aa
White text reads best on this color (14.42:1).
About this color
#1D274F is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.074 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 14.42:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.45:1 |
| White text | 14.42:1 |
Values
| HEX | #1D274F |
| RGB | rgb(29, 39, 79) |
| HSL | hsl(228, 46%, 21%) |
| OKLCH | oklch(28.7% 0.074 270.6) |
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 #1D274F | 14.42:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #1D274F | 1.45:1 | Fails | Lc 0.0 | Not readable |
| #1D274F text on white | 14.42:1 | AAA | Lc 101.1 | Preferred for body text |
| #1D274F text on black | 1.45:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ABBEFA
oklch(80.9% 0.088 270.8)
-
Step 400
400
#809AF8
oklch(70.7% 0.141 270.8)
-
Step 500
500
#627EF5
oklch(63.2% 0.18 270.5)
-
Step 600
600
#4B63E3
oklch(55.5% 0.195 270.7)
-
Step 700
700
#3D51C6
oklch(49.1% 0.183 270.7)
-
Step 800
800
#3243A0
oklch(42.6% 0.151 270.7)
-
Step 900
900
#2B3A7F
oklch(37.7% 0.118 270.6)
-
Step 950
950 (this color)
#1D274F
oklch(28.7% 0.074 270.6)
#1D274F 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) | #142C50 | 0.018 |
| Deuteranopia (no green cones) | #0D284E | 0.019 |
| Tritanopia (no blue cones) | #003037 | 0.066 |
| Achromatopsia (no color) | #2A2A2A | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D274F
#1D274F
oklch(28.7% 0.074 270.6)
- #362900
#362900
oklch(28.8% 0.059 90.2)
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 #1D274F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Marine #042E60 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.044
- Gunmetal #293241 ΔE 0.053
- Dark #1B2431 ΔE 0.056
- Marine Blue #01386A ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.067
Use #1D274F 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.