#297E9B
Closest named color: Cerulean (#457B9D). oklch(55.6% 0.09 225), rgb(41, 126, 155).
Aa
White text reads best on this color (4.61:1).
About this color
#297E9B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.090 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.023 away. White text reads best on it, at 4.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.55:1 |
| White text | 4.61:1 |
Values
| HEX | #297E9B |
| RGB | rgb(41, 126, 155) |
| HSL | hsl(195, 58%, 38%) |
| OKLCH | oklch(55.6% 0.09 225) |
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 #297E9B | 4.61:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #297E9B | 4.55:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #297E9B text on white | 4.61:1 | AA | Lc 71.7 | Content text, not long reading |
| #297E9B text on black | 4.55:1 | AA | Lc -29.9 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D5
oklch(80.9% 0.041 224.8)
-
Step 400
400
#73AABF
oklch(70.7% 0.065 223.9)
-
Step 500
500
#4B94AF
oklch(63% 0.083 224.7)
-
Step 600
600 (this color)
#297E9B
oklch(55.6% 0.09 225)
-
Step 700
700
#1A6A84
oklch(49% 0.084 224.9)
-
Step 800
800
#19576C
oklch(42.8% 0.07 224.9)
-
Step 900
900
#1C4857
oklch(37.8% 0.054 223.5)
-
Step 950
950
#122A33
oklch(27% 0.034 224.8)
#297E9B 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) | #6E7B9C | 0.069 |
| Deuteranopia (no green cones) | #5E709B | 0.061 |
| Tritanopia (no blue cones) | #008787 | 0.050 |
| Achromatopsia (no color) | #757575 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #297E9B
#297E9B
oklch(55.6% 0.09 225)
- #9F6145
#9F6145
oklch(55.5% 0.091 44.7)
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 #297E9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.023
- Ocean #017B92 ΔE 0.023
- Teal Blue #01889F ΔE 0.029
- Stormy Blue #507B9C ΔE 0.033
- Dull Blue #49759C ΔE 0.035
- Sea Blue #047495 ΔE 0.036
- Nice Blue #107AB0 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.041
Use #297E9B 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.