#02597B
Closest named color: Deep Sea Blue (#015482). oklch(43.7% 0.09 233.3), rgb(2, 89, 123).
Aa
White text reads best on this color (7.72:1).
About this color
#02597B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.090 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.022 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #02597B |
| RGB | rgb(2, 89, 123) |
| HSL | hsl(197, 97%, 25%) |
| OKLCH | oklch(43.7% 0.09 233.3) |
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 #02597B | 7.72:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #02597B | 2.71:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #02597B text on white | 7.72:1 | AAA | Lc 86.3 | Fine for body text |
| #02597B text on black | 2.71:1 | Fails | Lc -15.8 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#A0C7DE
oklch(80.9% 0.053 234.2)
-
Step 400
400
#69AACD
oklch(70.8% 0.084 233.2)
-
Step 500
500
#3994C0
oklch(63.2% 0.107 233.2)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800 (this color)
#02597B
oklch(43.7% 0.09 233.3)
-
Step 900
900
#104761
oklch(37.6% 0.07 234.2)
-
Step 950
950
#0C2A39
oklch(27% 0.045 233.7)
#02597B 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) | #48587D | 0.056 |
| Deuteranopia (no green cones) | #394E7A | 0.047 |
| Tritanopia (no blue cones) | #006265 | 0.053 |
| Achromatopsia (no color) | #535353 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02597B
#02597B
oklch(43.7% 0.09 233.3)
- #77421C
#77421C
oklch(43.6% 0.089 53.4)
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 #02597B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.022
- Light Navy #155084 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.035
- Petrol #005F6A ΔE 0.039
- Dusk Blue #26538D ΔE 0.043
- YInMn Blue #415A77 ΔE 0.047
- Peacock Blue #016795 ΔE 0.054
- Deep Teal #00555A ΔE 0.055
Use #02597B 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.