#002539
Closest named color: Oxford Blue (#1B263B). oklch(25.1% 0.055 237.7), rgb(0, 37, 57).
Aa
White text reads best on this color (15.86:1).
About this color
#002539 is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.055 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.031 away. White text reads best on it, at 15.86:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.86:1 |
Values
| HEX | #002539 |
| RGB | rgb(0, 37, 57) |
| HSL | hsl(201, 100%, 11%) |
| OKLCH | oklch(25.1% 0.055 237.7) |
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 #002539 | 15.86:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #002539 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #002539 text on white | 15.86:1 | AAA | Lc 102.5 | Preferred for body text |
| #002539 text on black | 1.32:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEF
oklch(88.5% 0.036 239.2)
-
Step 300
300
#99C8E6
oklch(81% 0.065 236.6)
-
Step 400
400
#5BAADA
oklch(70.7% 0.105 237.4)
-
Step 500
500
#1693D0
oklch(63% 0.134 237.8)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950 (this color)
#002539
oklch(25.1% 0.055 237.7)
#002539 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) | #1B253A | 0.030 |
| Deuteranopia (no green cones) | #132039 | 0.024 |
| Tritanopia (no blue cones) | #002A2C | 0.035 |
| Achromatopsia (no color) | #222222 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #002539
#002539
oklch(25.1% 0.055 237.7)
- #351A03
#351A03
oklch(25.1% 0.055 57.9)
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 #002539, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.031
- Dark #1B2431 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.040
- Jet #212529 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.066
- Navy Blue #001146 ΔE 0.070
- Gunmetal #293241 ΔE 0.071
- Marine #042E60 ΔE 0.075
Use #002539 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.