#02599A
Closest named color: Dusk Blue (#26538D). oklch(45.6% 0.127 249.7), rgb(2, 89, 154).
Aa
White text reads best on this color (7.24:1).
About this color
#02599A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.127 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.027 away. White text reads best on it, at 7.24:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #02599A |
| RGB | rgb(2, 89, 154) |
| HSL | hsl(206, 97%, 31%) |
| OKLCH | oklch(45.6% 0.127 249.7) |
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 #02599A | 7.24:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #02599A | 2.89:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #02599A text on white | 7.24:1 | AAA | Lc 84.5 | Fine for body text |
| #02599A text on black | 2.89:1 | Fails | Lc -17.5 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9CC5EF
oklch(80.9% 0.074 249.4)
-
Step 400
400
#63A6E8
oklch(70.8% 0.119 249.5)
-
Step 500
500
#308DE1
oklch(63% 0.153 249.9)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800 (this color)
#02599A
oklch(45.6% 0.127 249.7)
-
Step 900
900
#094373
oklch(37.6% 0.099 249.8)
-
Step 950
950
#092844
oklch(27.1% 0.063 249.6)
#02599A 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) | #385D9D | 0.038 |
| Deuteranopia (no green cones) | #1D5199 | 0.023 |
| Tritanopia (no blue cones) | #006972 | 0.092 |
| Achromatopsia (no color) | #575757 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02599A
#02599A
oklch(45.6% 0.127 249.7)
- #7A4B00
#7A4B00
oklch(45.6% 0.099 69.1)
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 #02599A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.040
- Light Navy #155084 ΔE 0.041
- Peacock Blue #016795 ΔE 0.044
- Cobalt #1E488F ΔE 0.048
- Denim #3B638C ΔE 0.057
Use #02599A 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.